Recent questions tagged normal

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What is a unimodal distribution?

asked Mar 7 in Data Science & Statistics by ♦Maths Genie Bronze Status (8,772 points) | 159 views

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Define a z-score in normal distribution

asked Mar 7 in Mathematics by ♦Maths Genie Bronze Status (8,772 points) | 117 views

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In order to better differentiate its product from generic brands, the cereal company first hired a marketing firm that specializes in creating campaigns . . .

asked Feb 12 in General Knowledge by ♦Maths Genie Bronze Status (8,772 points) | 137 views

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What is the z-score in statistics?

asked Feb 6 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 151 views

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What is the Gram-Schmidt process?

asked Jan 27 in Mathematics by ♦GaussTheBot Diamond (50,247 points) | 84 views

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What is a Gaussian distribution?

asked Jan 27 in Mathematics by ♦GaussTheBot Diamond (50,247 points) | 116 views

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What is the p-value associated with a z-score of 2.5 in a standard normal distribution?

asked Jan 27 in Mathematics by ♦GaussTheBot Diamond (50,247 points) | 113 views

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How to calculate percentages

asked Jan 27 in Mathematics by ♦GaussTheBot Diamond (50,247 points) | 84 views

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How does the Poisson distribution differ from the normal distribution?

asked Dec 15, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 108 views

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What is the normal distribution and how is it used in statistics?

asked Dec 6, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 150 views

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How can we use probability to make predictions or draw conclusions from a sample of data?

asked Dec 6, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 160 views

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What is a z-score in statistics?

asked Nov 20, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 141 views

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Is stinging or tingling from Uso SKincare products normal?

asked Sep 30, 2022 in General Knowledge by ♦GaussTheBot Diamond (50,247 points) | 118 views

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What is a normal line?

asked Sep 12, 2022 in Mathematics by ♦GaussTheBot Diamond (50,247 points) | 75 views

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Suppose you are provided with the "correct" standard deviation of a stock (from a highly reputable statistical agency) and you believe $25 \%$ is the correct value.

asked Aug 18, 2022 in General Knowledge by ♦MathsGee Platinum (93,169 points) | 142 views

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The value of $\mathrm{k}$, if the probability distribution of a $\mathrm{X}=\mathrm{x}: 1,2,3$ random variable $\mathrm{X}$ is $\mathrm{p}(\mathrm{X}=\mathrm{x}): \frac{1}{\mathrm{k}}, \frac{2}{\mathrm{k}}, \frac{3}{\mathrm{k}}$ is

asked Jul 29, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 156 views

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Compute the coefficient of skewness.

asked Jul 27, 2022 in Mathematics by ♦GaussTheBot Diamond (50,247 points) | 153 views

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The joint PDF of two random normal variables $X$ and $Y$ is given by

asked Jul 26, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 164 views

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How do I compute Probabilities Involving Normal Random Variables?

asked Jul 26, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 167 views

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Is there a difference between the cumulative probability distribution of discrete and continuous variables?

asked Jul 26, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 239 views

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A company pays its employees an average wage of $\$ 3.25$ an hour with a standard deviation of 60 cents. If the wages are approximately normally distributed, determine

asked Jul 23, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 631 views

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Find the following normal probabilities:

asked Jul 23, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 116 views

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What are the common percentages of the area under the standard normal curve?

asked Jul 23, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 171 views

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What is the formula for the standardised normal distribution?

asked Jul 23, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 137 views

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What is the standard normal distribution?

asked Jul 23, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 175 views

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How do I determine the area under a normal distribution curve using integration?

asked Jul 23, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 161 views

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What are the properties of a normal distribution?

asked Jul 23, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 171 views

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What is the normal distribution?

asked Jul 23, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 169 views

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I throw a die and get $\$ 1$ if it is showing 1 , and get $\$ 2$ if it is showing 2 , and get $\$ 3$ if it is showing 3 , etc. What is the amount of money I can expect if I throw it 100 times?

asked Jul 23, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 139 views

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The normal modes of a carbon dioxide molecule that are infrared-active include which of the following? I. Bending II. Symmetric stretching III. Asymmetric stretching Which of the following is the right choice? Explain your answer.

asked Jul 10, 2022 in General Knowledge by ♦GaussTheBot Diamond (50,247 points) | 175 views

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A juice company sells its product in either a 48 -ounce size or a 32 -ounce size. It charges $\$ 3.90$ for the 48 -ounce size.

asked Jul 7, 2022 in Mathematics by ♦MathsGee Platinum (93,169 points) | 149 views

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Is the influence of a single outlier greater on the sample range or the interquartile range? Explain.

asked Jun 17, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 123 views

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Is the influence of a single outlier greater on the mean or the median? Explain.

asked Jun 17, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 134 views

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Group these data into a frequency distribution showing how often each of the values occurs and draw a bar chart.

asked Jun 17, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 168 views

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Does MathsGee have a Normal Modes simulation?

asked May 1, 2022 in General Knowledge by ♦GaussTheBot Diamond (50,247 points) | 138 views

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Given $A C$ is a tangent of the blue circle and $B$ is a 90 degrees, what is the area of $\triangle A B C$ ?

asked Apr 13, 2022 in Mathematics by ♦MathsGee Platinum (93,169 points) | 366 views

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Given that the mean is equal to 75 with a standard deviation of $5.3$ what scores belong to the middle of $28 \%$ of the population?

asked Mar 8, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 305 views

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The value of a random variable, $\tilde{x}$, is determined by rolling one fair, 6-sided dice. Draw the PDF and CDF of $\tilde{x}$.

asked Mar 4, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 224 views

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A random variable, $\tilde{x}$, has a uniform distribution between the values 0 and 1 . Draw the probability density function (PDF) and Cumulative Density Function (CDF) of $\tilde{x}$.

asked Mar 4, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 272 views

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A random variable, $\tilde{x}$, has the PDF, $f_{\tilde{x}}(x)$. Write the equation to compute its total probability (hint: think area under the curve!). What is the answer to the equation?

asked Mar 4, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 209 views

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A marketing firm claims that its ad campaign will increase sales for a fast-food chain by $15 \%$. In a random sample of 25 stores, the average increase in sales was $14 \%$ with a standard deviation of $5 \%$.

asked Feb 15, 2022 in General Knowledge by ♦GaussTheBot Diamond (50,247 points) | 193 views

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How do you calculate the skewness z-score?

asked Feb 14, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 741 views

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The border control authorities at Cape Town harbour claim that imported food materials are cleared within an average of 48 hours of the goods being offloaded from a vessel.

asked Feb 5, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 321 views

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What do z-scores denote?

asked Jan 24, 2022 in Data Science & Statistics by ♦MathsGee Platinum (93,169 points) | 212 views

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In $\mathbb{R}^{3}$, let $N$ be a non-zero vector and $X_{0}$ and $Z$ points.

asked Jan 21, 2022 in Mathematics by ♦MathsGee Platinum (93,169 points) | 218 views

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How do I determine the equation of a normal in $R^2$ or $R^3$?

asked Jan 13, 2022 in Mathematics by ♦MathsGee Platinum (93,169 points) | 167 views

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A restaurant claims that the waiting time of customers for service is normally distributed with a mean of 3 minutes and a standard deviation of 1 minute.

asked Jan 8, 2022 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 320 views

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What is the probability density function for the normal distribution?

asked Dec 16, 2021 in Data Science & Statistics by ♦GaussTheBot Diamond (50,247 points) | 738 views

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What does "the bigger the spread of distribution" mean?

asked Nov 3, 2021 in General Knowledge by ♦MathsGee Platinum (93,169 points) | 361 views

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What is standard deviation?

asked Nov 3, 2021 in General Knowledge by ♦MathsGee Platinum (93,169 points) | 263 views

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