MathsGee QnA - Recent questions and answers
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Powered by Question2AnswerAnswered: Define conditional probability.
https://mathsgee.com/qna/1612/define-conditional-probability?show=1615#a1615
Conditional probability is the likelihood of an event occurring, based on the occurrence of a previous event.Statistics Questionshttps://mathsgee.com/qna/1612/define-conditional-probability?show=1615#a1615Thu, 20 Jun 2019 03:21:47 +0000How can Africa reshape African and Diaspora Images, Narratives, and Relationships?
https://mathsgee.com/qna/1614/how-can-africa-reshape-african-and-diaspora-images-narratives-and-relationships
How can Africa reshape African and Diaspora Images, Narratives, and Relationships?<br />
<br />
<a href="https://youtu.be/ZVJiJShNfrY" rel="nofollow" target="_blank">https://youtu.be/ZVJiJShNfrY</a>#Agenda2063https://mathsgee.com/qna/1614/how-can-africa-reshape-african-and-diaspora-images-narratives-and-relationshipsWed, 19 Jun 2019 02:39:52 +0000Should the APRM be voluntary?
https://mathsgee.com/qna/1613/should-the-aprm-be-voluntary
Should the APRM be voluntary?<br />
<br />
<a href="https://youtu.be/5EW1OpiZX38" rel="nofollow" target="_blank">https://youtu.be/5EW1OpiZX38</a>#Agenda2063https://mathsgee.com/qna/1613/should-the-aprm-be-voluntaryWed, 19 Jun 2019 02:36:31 +0000What is time series? State the models used in time series analysis.
https://mathsgee.com/qna/1611/what-is-time-series-state-the-models-used-in-time-series-analysis
<p style="margin-left:9.0pt">What is time series? State the models used in time series analysis.</p>Statistics Questionshttps://mathsgee.com/qna/1611/what-is-time-series-state-the-models-used-in-time-series-analysisWed, 19 Jun 2019 02:29:56 +0000Prove the Laspeyrc’s price index number is the weighted A.M. of the price relatives.
https://mathsgee.com/qna/1610/prove-the-laspeyrcs-price-index-number-is-the-weighted-a-m-of-the-price-relatives
Prove the Laspeyrc’s price index number is the weighted A.M. of the price relatives.Statistics Questionshttps://mathsgee.com/qna/1610/prove-the-laspeyrcs-price-index-number-is-the-weighted-a-m-of-the-price-relativesWed, 19 Jun 2019 02:29:17 +0000If two regression lines are 3x+xy-26=0 and 6x+y-31=0 find correlation coefficient.
https://mathsgee.com/qna/1609/if-two-regression-lines-are-3x-xy-26-0-and-6x-y-31-0-find-correlation-coefficient
<p style="margin-left:9.0pt">If two regression lines are 3x+xy-26=0 and 6x+y-31=0 find correlation coefficient.</p>Statistics Questionshttps://mathsgee.com/qna/1609/if-two-regression-lines-are-3x-xy-26-0-and-6x-y-31-0-find-correlation-coefficientWed, 19 Jun 2019 02:28:20 +0000What is curve Fitting?
https://mathsgee.com/qna/1608/what-is-curve-fitting
What is curve Fitting?Statistics Questionshttps://mathsgee.com/qna/1608/what-is-curve-fittingWed, 19 Jun 2019 02:27:44 +0000State the properties of the arithmetic Mean
https://mathsgee.com/qna/1607/state-the-properties-of-the-arithmetic-mean
State the properties of the arithmetic MeanStatistics Questionshttps://mathsgee.com/qna/1607/state-the-properties-of-the-arithmetic-meanWed, 19 Jun 2019 02:27:14 +0000Distinguish between Simple and weighted averages
https://mathsgee.com/qna/1606/distinguish-between-simple-and-weighted-averages
Distinguish between Simple and weighted averagesStatistics Questionshttps://mathsgee.com/qna/1606/distinguish-between-simple-and-weighted-averagesWed, 19 Jun 2019 02:26:06 +0000Distinguish between Nominal and ordinal data
https://mathsgee.com/qna/1605/distinguish-between-nominal-and-ordinal-data
Distinguish between Nominal and ordinal dataStatistics Questionshttps://mathsgee.com/qna/1605/distinguish-between-nominal-and-ordinal-dataWed, 19 Jun 2019 02:25:08 +0000Outline the procedure for testing a hypothesis for a sampling distribution.
https://mathsgee.com/qna/1604/outline-the-procedure-for-testing-a-hypothesis-for-a-sampling-distribution
Outline the procedure for testing a hypothesis for a sampling distribution.Statistics Questionshttps://mathsgee.com/qna/1604/outline-the-procedure-for-testing-a-hypothesis-for-a-sampling-distributionWed, 19 Jun 2019 02:22:18 +0000State four assumptions of a chi-square test .
https://mathsgee.com/qna/1603/state-four-assumptions-of-a-chi-square-test
State four assumptions of a chi-square test .Statistics Questionshttps://mathsgee.com/qna/1603/state-four-assumptions-of-a-chi-square-testWed, 19 Jun 2019 02:21:37 +0000Define the two types of errors in hypothesis testing.
https://mathsgee.com/qna/1602/define-the-two-types-of-errors-in-hypothesis-testing
Define the two types of errors in hypothesis testing.Statistics Questionshttps://mathsgee.com/qna/1602/define-the-two-types-of-errors-in-hypothesis-testingWed, 19 Jun 2019 02:21:03 +0000State the four elements of a statistical test
https://mathsgee.com/qna/1601/state-the-four-elements-of-a-statistical-test
State the four elements of a statistical testStatistics Questionshttps://mathsgee.com/qna/1601/state-the-four-elements-of-a-statistical-testWed, 19 Jun 2019 02:20:20 +0000State and explain four categories of qualitative data. Give an example of each.
https://mathsgee.com/qna/1600/state-and-explain-four-categories-of-qualitative-data-give-an-example-of-each
State and explain four categories of qualitative data. Give an example of each.Statistics Questionshttps://mathsgee.com/qna/1600/state-and-explain-four-categories-of-qualitative-data-give-an-example-of-eachWed, 19 Jun 2019 02:19:38 +0000The descriptive measure of dispersion that is based on the concept of a deviation about the mean is
https://mathsgee.com/qna/1599/the-descriptive-measure-of-dispersion-that-is-based-on-the-concept-of-a-deviation-about-the-mean-is
The descriptive measure of dispersion that is based on the concept of a deviation about the mean is<br />
<br />
<br />
<br />
a. the range<br />
b. the interquartile range<br />
c. both a and b<br />
d. the standard deviation<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1599/the-descriptive-measure-of-dispersion-that-is-based-on-the-concept-of-a-deviation-about-the-mean-isWed, 19 Jun 2019 02:18:14 +0000When should measures of location and dispersion be computed from grouped data rather than from individual data values?
https://mathsgee.com/qna/1598/when-should-measures-of-location-and-dispersion-be-computed-from-grouped-data-rather-than-from-individual-data-values
When should measures of location and dispersion be computed from grouped data rather than from individual data values?<br />
<br />
a. as much as possible since computations are easier<br />
b. only when individual data values are unavailable<br />
c. whenever computer packages for descriptive statistics are unavailable<br />
d. only when the data are from a population<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1598/when-should-measures-of-location-and-dispersion-be-computed-from-grouped-data-rather-than-from-individual-data-valuesWed, 19 Jun 2019 02:17:23 +0000The measure of dispersion that is influenced most by extreme values is
https://mathsgee.com/qna/1597/the-measure-of-dispersion-that-is-influenced-most-by-extreme-values-is
The measure of dispersion that is influenced most by extreme values is<br />
<br />
a. the variance<br />
b. the standard deviation<br />
c. the range<br />
d. the interquartile range<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1597/the-measure-of-dispersion-that-is-influenced-most-by-extreme-values-isWed, 19 Jun 2019 02:16:32 +0000In computing descriptive statistics from grouped data,
https://mathsgee.com/qna/1596/in-computing-descriptive-statistics-from-grouped-data
In computing descriptive statistics from grouped data,<br />
<br />
a. data values are treated as if they occur at the midpoint of a class<br />
b. the grouped data result is more accurate than the ungrouped result<br />
c. the grouped data computations are used only when a population is being analyzed<br />
d. All of the above answers are correct.<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1596/in-computing-descriptive-statistics-from-grouped-dataWed, 19 Jun 2019 02:15:43 +0000If the variance of a data set is correctly computed with the formula using n - 1 in the denominator, which of the following is true?
https://mathsgee.com/qna/1595/if-the-variance-of-a-data-set-is-correctly-computed-with-the-formula-using-n-1-in-the-denominator-which-of-the-following-is-true
If the variance of a data set is correctly computed with the formula using n - 1 in the denominator, which of the following is true?<br />
<br />
a. the data set is a sample<br />
b. the data set is a population<br />
c. the data set could be either a sample or a population<br />
d. the data set is from a census<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1595/if-the-variance-of-a-data-set-is-correctly-computed-with-the-formula-using-n-1-in-the-denominator-which-of-the-following-is-trueWed, 19 Jun 2019 02:14:59 +0000The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals
https://mathsgee.com/qna/1594/the-variance-of-a-sample-of-81-observations-equals-64-the-standard-deviation-of-the-sample-equals
The variance of a sample of 81 observations equals 64. The standard deviation of the sample equals<br />
<br />
a. 0<br />
b. 4096<br />
c. 8<br />
d. 6,561<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1594/the-variance-of-a-sample-of-81-observations-equals-64-the-standard-deviation-of-the-sample-equalsWed, 19 Jun 2019 02:13:55 +0000The standard deviation of a sample of 100 observations equals 64. The variance of the sample equals
https://mathsgee.com/qna/1593/the-standard-deviation-of-a-sample-of-100-observations-equals-64-the-variance-of-the-sample-equals
The standard deviation of a sample of 100 observations equals 64. The variance of the sample equals<br />
<br />
a. 8<br />
b. 10<br />
c. 6,400<br />
d. 4,096<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1593/the-standard-deviation-of-a-sample-of-100-observations-equals-64-the-variance-of-the-sample-equalsWed, 19 Jun 2019 02:13:20 +0000A tabular summary of a set of data showing the fraction of the total number of items in several classes is a
https://mathsgee.com/qna/1592/a-tabular-summary-of-a-set-of-data-showing-the-fraction-of-the-total-number-of-items-in-several-classes-is-a
A tabular summary of a set of data showing the fraction of the total number of items in several classes is a<br />
<br />
a. frequency distribution<br />
b. relative frequency distribution<br />
c. frequency<br />
d. cumulative frequency distribution<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1592/a-tabular-summary-of-a-set-of-data-showing-the-fraction-of-the-total-number-of-items-in-several-classes-is-aWed, 19 Jun 2019 02:12:37 +0000This is an example of...
https://mathsgee.com/qna/1591/this-is-an-example-of
A statistics professor asked students in a class their ages. On the basis of this information, the professor states that the average age of all the students in the university is 21 years. This is an example of<br />
<br />
a. a census<br />
b. descriptive statistics<br />
c. an experiment<br />
d. statistical inference<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1591/this-is-an-example-ofWed, 19 Jun 2019 02:11:48 +0000This report is an example of
https://mathsgee.com/qna/1590/this-report-is-an-example-of
In a sample of 800 students in a university, 160, or 20%, are Business majors. Based on the above information, the school's paper reported that "20% of all the students at the university are Business majors." This report is an example of<br />
<br />
<br />
<br />
a. a sample<br />
b. a population<br />
c. statistical inference<br />
d. descriptive statistics<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1590/this-report-is-an-example-ofWed, 19 Jun 2019 02:10:50 +0000The most frequently occurring value of a data set is called the
https://mathsgee.com/qna/1589/the-most-frequently-occurring-value-of-a-data-set-is-called-the
The most frequently occurring value of a data set is called the<br />
<br />
a. range<br />
b. mode<br />
c. mean<br />
d. median<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1589/the-most-frequently-occurring-value-of-a-data-set-is-called-theWed, 19 Jun 2019 02:09:51 +0000The value that has half of the observations above it and half the observations below it is called the
https://mathsgee.com/qna/1588/the-value-that-has-half-of-the-observations-above-it-and-half-the-observations-below-it-is-called-the
The value that has half of the observations above it and half the observations below it is called the<br />
<br />
a. range<br />
b. median<br />
c. mean<br />
d. mode<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1588/the-value-that-has-half-of-the-observations-above-it-and-half-the-observations-below-it-is-called-theWed, 19 Jun 2019 02:09:19 +0000The sum of deviations of the individual data elements from their mean is
https://mathsgee.com/qna/1587/the-sum-of-deviations-of-the-individual-data-elements-from-their-mean-is
The sum of deviations of the individual data elements from their mean is<br />
<br />
a. always greater than zero<br />
b. always less than zero<br />
c. sometimes greater than and sometimes less than zero, depending on the data elements<br />
d. always equal to zero<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1587/the-sum-of-deviations-of-the-individual-data-elements-from-their-mean-isWed, 19 Jun 2019 02:08:38 +0000If a data set has an even number of observations, the median
https://mathsgee.com/qna/1586/if-a-data-set-has-an-even-number-of-observations-the-median
If a data set has an even number of observations, the median<br />
<br />
a. can not be determined<br />
b. is the average value of the two middle items<br />
c. must be equal to the mean<br />
d. is the average value of the two middle items when all items are arranged in ascending order<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1586/if-a-data-set-has-an-even-number-of-observations-the-medianWed, 19 Jun 2019 02:07:57 +0000Which of the following is not a measure of central location?
https://mathsgee.com/qna/1585/which-of-the-following-is-not-a-measure-of-central-location
Which of the following is not a measure of central location?<br />
<br />
a. mean<br />
b. median<br />
c. variance<br />
d. mode<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1585/which-of-the-following-is-not-a-measure-of-central-locationWed, 19 Jun 2019 02:07:23 +0000The difference between the largest and the smallest data values is the
https://mathsgee.com/qna/1584/the-difference-between-the-largest-and-the-smallest-data-values-is-the
The difference between the largest and the smallest data values is the<br />
<br />
a. variance<br />
b. interquartile range<br />
c. range<br />
d. coefficient of variation<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1584/the-difference-between-the-largest-and-the-smallest-data-values-is-theWed, 19 Jun 2019 02:06:33 +0000Since the mode is the most frequently occurring data value, it
https://mathsgee.com/qna/1583/since-the-mode-is-the-most-frequently-occurring-data-value-it
Since the mode is the most frequently occurring data value, it<br />
<br />
a. can never be larger than the mean<br />
b. is always larger than the median<br />
c. is always larger than the mean<br />
d. must have a value of at least two<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1583/since-the-mode-is-the-most-frequently-occurring-data-value-itWed, 19 Jun 2019 02:05:43 +0000In a five number summary, which of the following is not used for data summarization?
https://mathsgee.com/qna/1582/in-a-five-number-summary-which-of-the-following-is-not-used-for-data-summarization
In a five number summary, which of the following is not used for data summarization?<br />
<br />
a. the smallest value<br />
b. the largest value<br />
c. the median<br />
d. the 25th percentile<br />
e. the meanStatistics Questionshttps://mathsgee.com/qna/1582/in-a-five-number-summary-which-of-the-following-is-not-used-for-data-summarizationWed, 19 Jun 2019 02:05:04 +0000The sum of the percent frequencies for all classes will always equal
https://mathsgee.com/qna/1581/the-sum-of-the-percent-frequencies-for-all-classes-will-always-equal
The sum of the percent frequencies for all classes will always equal<br />
<br />
a. one<br />
b. the number of classes<br />
c. the number of items in the study<br />
d. 100<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1581/the-sum-of-the-percent-frequencies-for-all-classes-will-always-equalWed, 19 Jun 2019 02:04:17 +0000The mean of a sample is
https://mathsgee.com/qna/1580/the-mean-of-a-sample-is
<p>The mean of a sample is
<br>
a. always equal to the mean of the population
<br>
b. always smaller than the mean of the population
<br>
c. computed by summing the <a rel="nofollow" href="https://brainmass.com/computer-science/data">data</a> values and dividing the sum by (n - 1)
<br>
d. computed by summing all the data values and dividing the sum by the number of items
<br>
e. None of the above answers is correct.</p>Statistics Questionshttps://mathsgee.com/qna/1580/the-mean-of-a-sample-isWed, 19 Jun 2019 02:03:31 +0000Mu is an example of a
https://mathsgee.com/qna/1579/mu-is-an-example-of-a
Mu is an example of a<br />
<br />
a. population parameter<br />
b. sample statistic<br />
c. population variance<br />
d. mode<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1579/mu-is-an-example-of-aWed, 19 Jun 2019 02:02:52 +0000Since the population size is always larger than the sample size, then the sample statistic
https://mathsgee.com/qna/1578/since-the-population-size-is-always-larger-than-the-sample-size-then-the-sample-statistic
Since the population size is always larger than the sample size, then the sample statistic<br />
<br />
a. can never be larger than the population parameter<br />
b. can never be equal to the population parameter<br />
c. can never be zero<br />
d. can never be smaller than the population parameter<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1578/since-the-population-size-is-always-larger-than-the-sample-size-then-the-sample-statisticWed, 19 Jun 2019 02:02:09 +0000A numerical value used as a summary measure for a sample, such as sample mean, is known as a
https://mathsgee.com/qna/1577/a-numerical-value-used-as-a-summary-measure-for-a-sample-such-as-sample-mean-is-known-as-a
A numerical value used as a summary measure for a sample, such as sample mean, is known as a<br />
<br />
a. population parameter<br />
b. sample parameter<br />
c. sample statistic<br />
d. population mean<br />
e. None of the above answers is correct.Statistics Questionshttps://mathsgee.com/qna/1577/a-numerical-value-used-as-a-summary-measure-for-a-sample-such-as-sample-mean-is-known-as-aWed, 19 Jun 2019 02:01:23 +0000Find the mean mark for a candidate whose chance of correctly answering each question is 0.8?
https://mathsgee.com/qna/1576/find-the-mean-mark-for-a-candidate-whose-chance-of-correctly-answering-each-question-is-0-8
An examination consists of 25 multiple choice questions each with five alternatives only one of which is correct. It is decided to subtract one mark for each incorrect answer and to award four marks for each correct answer. Find the mean mark for a candidate whose chance of correctly answering each question is 0.8?<br />
<br />
a.) 20<br />
<br />
b.) 40<br />
<br />
c.) 65<br />
<br />
d.) 75Statistics Questionshttps://mathsgee.com/qna/1576/find-the-mean-mark-for-a-candidate-whose-chance-of-correctly-answering-each-question-is-0-8Wed, 19 Jun 2019 01:59:36 +0000Which of the following statement is true?
https://mathsgee.com/qna/1575/which-of-the-following-statement-is-true
Which of the following statement is true?<br />
<br />
A) Probability density function is always positive<br />
<br />
B) The range of variable for PDF can be finite as well as infinite.<br />
<br />
C) For an infinite range variable, probability cannot be calculated.<br />
<br />
D) PDF and CDF are the same thing but with different limits.<br />
<br />
a.) A, C<br />
<br />
b.) B, C, D<br />
<br />
c.) A, B, C<br />
<br />
d.) A, C, DStatistics Questionshttps://mathsgee.com/qna/1575/which-of-the-following-statement-is-trueWed, 19 Jun 2019 01:57:42 +0000Under which of the following cases, confidence interval for the population mean cannot be constructed?
https://mathsgee.com/qna/1574/under-which-of-the-following-cases-confidence-interval-for-the-population-mean-cannot-be-constructed
Under which of the following cases, confidence interval for the population mean cannot be constructed?<br />
<br />
a.) A skewed population with a large sample and an unknown population variance<br />
<br />
b.) A normal population with a large sample and a known population variance<br />
<br />
c.) A skewed population with a small sample and an unknown population variance<br />
<br />
d.) A normal population with a small sample and an unknown population varianceStatistics Questionshttps://mathsgee.com/qna/1574/under-which-of-the-following-cases-confidence-interval-for-the-population-mean-cannot-be-constructedWed, 19 Jun 2019 01:54:56 +0000Which of the following is correct?
https://mathsgee.com/qna/1573/which-of-the-following-is-correct
In pilot testing of a new product, distribution A corresponds to the product ratings given by the company personnel while distribution B corresponds to the product ratings by a stratified sample of consumers. Which of the following is correct?Statistics Questionshttps://mathsgee.com/qna/1573/which-of-the-following-is-correctWed, 19 Jun 2019 01:53:43 +0000Formulate the appropriate null hypothesis and alternate hypothesis.
https://mathsgee.com/qna/1572/formulate-the-appropriate-null-hypothesis-and-alternate-hypothesis
Formulate the appropriate null hypothesis and alternate hypothesis. The head of the sales department informs the accounts department that the average tour and travel expenses of his team members does not exceed $. 6,000 per month. However, the senior accountant has recently observed that the tour and travel expenses have been increasing and so he decides to test the sales head's claims by considering a sample of his team members' expenses over the last three monthsStatistics Questionshttps://mathsgee.com/qna/1572/formulate-the-appropriate-null-hypothesis-and-alternate-hypothesisWed, 19 Jun 2019 01:52:46 +0000In which attempt does he get the right code?
https://mathsgee.com/qna/1571/in-which-attempt-does-he-get-the-right-code
Tom is trying to open Bob’s computer at office since Bob is on leave. The password consists of digits only and the digits could be from 0-9. He remembers that the password is of 3 digits and no digits repeat. Assume that he gets the correct code only after making all possible attempts. In which attempt does he get the right code?Statistics Questionshttps://mathsgee.com/qna/1571/in-which-attempt-does-he-get-the-right-codeWed, 19 Jun 2019 01:51:53 +0000When a card is drawn from a well shuffled deck of cards, what is the probability of getting a black king?
https://mathsgee.com/qna/1570/when-a-card-is-drawn-from-a-well-shuffled-deck-of-cards-what-is-the-probability-of-getting-a-black-king
When a card is drawn from a well shuffled deck of cards, what is the probability of getting a black king?Statistics Questionshttps://mathsgee.com/qna/1570/when-a-card-is-drawn-from-a-well-shuffled-deck-of-cards-what-is-the-probability-of-getting-a-black-kingWed, 19 Jun 2019 01:50:32 +0000A pair of fair dice is tossed. What is the probability that the maximum of the two numbers is greater than 4?
https://mathsgee.com/qna/1569/a-pair-of-fair-dice-is-tossed-what-is-the-probability-that-the-maximum-of-the-two-numbers-is-greater-than-4
A pair of fair dice is tossed. What is the probability that the maximum of the two numbers is greater than 4?Statistics Questionshttps://mathsgee.com/qna/1569/a-pair-of-fair-dice-is-tossed-what-is-the-probability-that-the-maximum-of-the-two-numbers-is-greater-than-4Wed, 19 Jun 2019 01:49:53 +0000A class contains 10 men and 20 women of which half men and half women have brown eyes. Find the probability that a person chosen at random is a man or has brown eyes.
https://mathsgee.com/qna/1568/a-class-contains-10-men-and-20-women-of-which-half-men-and-half-women-have-brown-eyes-find-the-probability-that-a-person-chosen-at-random-is-a-man-or-has-brown-eyes
A class contains 10 men and 20 women of which half men and half women have brown eyes. Find the probability that a person chosen at random is a man or has brown eyes.Statistics Questionshttps://mathsgee.com/qna/1568/a-class-contains-10-men-and-20-women-of-which-half-men-and-half-women-have-brown-eyes-find-the-probability-that-a-person-chosen-at-random-is-a-man-or-has-brown-eyesWed, 19 Jun 2019 01:49:16 +0000The totality of all objects under a study is called _______
https://mathsgee.com/qna/1567/the-totality-of-all-objects-under-a-study-is-called
The totality of all objects under a study is called _______<br />
<br />
a) Sample<br />
<br />
b) Group<br />
<br />
c)Population<br />
<br />
d)SpecimenStatistics Questionshttps://mathsgee.com/qna/1567/the-totality-of-all-objects-under-a-study-is-calledWed, 19 Jun 2019 01:48:28 +0000Can we say that there is a significant difference of the sample mean from the intended weight of 16 OZ ?
https://mathsgee.com/qna/1566/can-we-say-that-there-is-a-significant-difference-of-the-sample-mean-from-the-intended-weight-of-16-oz
Sixteen Cartons are taken at random from an automatic filling machine. The mean net weight of the 16 cartons is 15.4 OZ. and the standard deviation is 0.88 OZ. Can we say that there is a significant difference of the sample mean from the intended weight of 16 OZ ?<br />
(It is given that value oft for 15, 16, 17 degrees of freedom at 5% level of significance are 2.131, 2.120 ( and 2.110).Statistics Questionshttps://mathsgee.com/qna/1566/can-we-say-that-there-is-a-significant-difference-of-the-sample-mean-from-the-intended-weight-of-16-ozWed, 19 Jun 2019 01:46:45 +0000Test at 1% level of significance whether the average weekly food expenditure of the two populations of shoppers are equal
https://mathsgee.com/qna/1565/test-at-1-level-of-significance-whether-the-average-weekly-food-expenditure-of-the-two-populations-of-shoppers-are-equal
In a survey of buying habits, 400 women shoppers are chosen at random in super market ‘A’ located in a certain section of the city. Their average weekly food expenditure is \$250 with a standard deviation of \$40. For 400 women shoppers chosen at random in super market ‘B’ in another section of the city, the average weekly food expenditure is \$220 with a standard deviation of \$55. Test at 1% level of significance whether the average weekly food expenditure of the two populations of shoppers are equal. (At 1% level of significance, the critical value of Z = ±2.58).Statistics Questionshttps://mathsgee.com/qna/1565/test-at-1-level-of-significance-whether-the-average-weekly-food-expenditure-of-the-two-populations-of-shoppers-are-equalWed, 19 Jun 2019 01:42:45 +0000