Recent questions tagged population

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What is India's population size?
86
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If we want to estimate the population proportion with a margin of error of 0.10 for a level of confidence of 90% and has no estimate for the population proportion. What i...
134
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If 1,234,567 people are registered to vote in a province and we estimate that about 60% will vote, approximately how many people will vote?
118
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In a small town, 2,500 people are eligible to vote. If 1,500 of them voted in the last election, what percentage of eligible voters cast their vote?
553
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What is pooled population standard deviation?
266
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Define the term "population mean under testing"
348
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The population of City \(\mathrm{X}\) increased from 2 million in the year 2000 to \(2.5\) million in 2015 and the gross domestic product of the city in 2000 was \(\frac{...
622
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Why do people visit Acalytica?
201
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A colony of an endangered species originally numbering 1000 was predicted to have a population \(\mathrm{N}\) after \(t\) years given by the equation \(\mathrm{N}=1000(0,...
349
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An algal cell population is found to have \(a_k\) cells on day \(k\). Each day, the number of cells at least doubles. If \(a_0 \geq 1\) and \(a_3 \leq 60\), how many quad...
372
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How does one make sure a sample from a population is random?
589
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What is the effect of megatrends such as population growth and urbanisation on planning and development?
823
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Identify the statistical population, sample, and variable of interest in each of the following situations:(a) Tensile strength is measured on 20 specimens of super streng...
337
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A television channel announced a vote for their viewers' favorite television show. Viewers were asked to visit the channel's website and vote online for their favorite sh...
501
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What is a statistical sample?
536
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What is a statistical population?
407
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What is the mathematical definition of sample variance?
803
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It was found that the mean length of 100 parts produced by a lathe was \(20.05 \mathrm{~mm}\) with a standard deviation of \(0.02 \mathrm{~mm}\). Find the probability tha...
707
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Of all the smokers in a particular district, \(40 \%\) prefer brand \(A\) and \(60 \%\) prefer brand \(B\). Of those smokers who prefer brand \(A, 30 \%\) are females, an...
369
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What is the sample space when a die is thrown once?
302
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Italy has a population of \(59.21\) million people. \(15.6\) million people are 65 years or older (" \(65+\) group"). Calculate the relative share of the people in the \(...
204
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In a certain town, \(30 \%\) of the people are conservatives, \(50 \%\) socialists, and \(20 \%\) liberals. In this town at the last election, \(65 \%\) of conservatives ...
407
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Engineers are developing a miniaturized robotic capsule for exploration of a human gastrointestinal tract. One novel solution uses motor-driven legs. The engineers' best ...
597
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What is sample variance?
564
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What is the formula of a sample mean?
275
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A magazine which features the latest computer hardware and software for homeoffice use asks readers to go to their website and indicate whether or not they owned specific...
673
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Transceivers provide wireless communication between electronic components of consumer products, especially transceivers of Bluetooth standards. Addressing a need for a fa...
269
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For ceiling fans to rotate effectively, the bending angle of the individual paddles of the fan must remain between tight limits. From each hour's production, 25 fans are ...
877
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Identify the statistical population, sample, and variable of interest in each of the following situations:(a) Tensile strength is measured on 20 specimens of super streng...
404
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Consider the population of all cars owned by women in your neighborhood. You want to know the model of the car.(a) Specify the population unit.(b) Specify the variable of...
286
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A television channel announced a vote for their viewers' favorite television show. Viewers were asked to visit the channel's website and vote online for their favorite sh...
343
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1 answers
An article in a civil engineering magazine asks "How Strong Are the Pillars of Our Overhead Bridges?" and goes on to say that samples were collected of materials being us...
744
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How often is a census conducted?
786
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Who organises the South African Census?
741
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What is a population census?
433
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Josh rolls one six-sided die and one four-sided die. What is the probability he will roll two odd numbers?
608
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What are the formulae for population and sample variance?
407
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The Bloom Biscuit Company is planning a marketing strategy for the upcoming year. They plan on doing a survey to see how many residents in their state bake. Marketing ass...
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A six-sided die has four green and two red faces and is balanced so that each face is equally likely to come up. The die will be rolled several times. You must choose one...
793
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A fair coin is tossed, and a fair die is thrown. Write down sample spaces for(a) the toss of the coin;(b) the throw of the die;(c) the combination of these experiments.Le...
1.3k
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A reporter for a student newspaper is writing an article on the cost of off-campus housing. A sample of 16 one-bedroom apartments within a half-mile of campus resulted in...
393
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What is a census?
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A grocery store is interested in how much money, on average, their customers spend each visit in the produce department. Using their store records, they draw a sample of ...
534
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Define population and mention the criteria of selecting sample from it.
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How is sample size of a definite population determined?
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In a questionnaire of 100 students at Acalytica University, \(20 \%\) were found to be Business Management students. Based on this information, the researcher generalises...
648
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The first step in the sampling process is to:a. Determine the sampling frameb. Select the sampling techniquec. Determine the appropriate sample sized. Define the populati...
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An electric pole, 7 meters high, casts a shadow of 5 meters. Find the height of a tree that casts a shadow of 10 meters under similar conditions.
386
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Student ratings of college instructors is common and widespread across the USA. Often such ratings consist of several instructional dimensions such as course organization...
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Assume you wish to randomly sample from a population of 33,050 teachers across the southeast USA. With a \(95 \%\) confidence level and an error rate of no more than \(\p...
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