What is the value of the variance if the mean of a frequency distribution is 100 and the coefficient of variation is 45%?

Q: d. Describe how any outlier affects the mean and the standard deviation

A: If X1, X2, ..., Xn are n observations in an experiment,  Mean=1n∑i=1nxiStandard…

Q: In a series of 5 observations, the values of mean and variance are 4.4 and 8.24. If three…

A: It is given that the mean and standard deviation are 4.4 and 8.24.

Q: In a frequency distribution the coefficient of skewness based upon the quartile is 0.6. If the sum…

A: Skewness is used to measure the shape of the distribution. There are three types of skewness, they…

Q: The profit for a production process is equal to $2,000 minus two times the number of units produced.…

A: Consider X is the number of units produced Here, Y = 2000-2X It is known that E(X) = 500, Var (X) =…

Q: If the coefficient of variation of the data = 40 % , the variance = 100 , then the mean of these…

A: We have given that,  Variance (s^2) = 100 Standard deviation (s) = sqrt(variance)…

Q: community has 1500 people with a mean age of 42 and a variance of 16. If you draw a random sample of…

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Q: In a series of 5 observations, the values of mean and variance are 4.4 and 8.24. If three…

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Q: what percent of the data falls within 2 standard deviations of the mean?

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Q: What is an everyday example of variance within samples?

A: If we need to know the variance within samples, we need to use ANOVA Test.

Q: 2) If all of the values in a set of data were doubled, what would happen to the variance?

A: We need to use the concept of variance.

Q: If a data set has 25 values and a standard deviation 7.4, what is the variance?

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Q: When solving a problem related to one sample and the confidence interval of variance. Which table…

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Q: Situation The sum of the product of the individual frequency and difference of the datum and mean is…

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Q: Situation The sum of the product of the individual frequency and difference of the datum and mean is…

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Q: the variance of a data set is 144 and mean is 72 then coefficient of variance is

A: Given,variance(σ2)=144mean(x¯)=72

Q: what is its distribution, its mean and its variance?

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Q: Which of the sections had the most variance in the scores?

A: Given: Section Mean Standard deviation English 20.3 6.8 Math 20.7 5.4 Reading 21.4 6.5…

Q: What statistical calculation, which results in the same units as the measured data, represents the…

A: Introduction: For a random variable X taking n sample values, the sample variance is given by the…

Q: In this investigation, you learn how to decide if a value of x2 is statistically significant. How…

A: Here we have been provided with two samples falling into various categories. We will use Chi-Square…

Q: The mean of a data set is 12.5 cm, and the variance is 4.0 cm. What is the z-score of 9.5?

A: Mean = 12.5 Variance = 4.0  Raw score = 9.5

Q: What is Statistical Measure of the Amount of Variation in a Population?

A: Standard deviation: The standard deviation indicates by how much each observation differs from a…

Q: The sum of the squared deviation scores, aka the sum of the squares, is SS=60 for a sample of n=5…

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Q: If a data set has 25 values and a standard deviation of 7.4, then the variance is?

A: Given: Standard deviation = 7.4

Q: In a sample of 81 elements, the mean was 60 and the variance was 144. What is the standard error for…

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Q: what is the  z score of 128,101,116,119,131 when the mean is 119 and variance is 36

A: It is given that  Mean, μ = 119 Variance, σ2 = 36 Standard deviation, σ = 6 Z-Score, Z = ( X - μ )/σ

Q: What is the variance of the following data( 1, 2, 3, 4, and 5)?

A: According to the given information in this question We need to calculate the value of variance

Q: Describe when you would use an analysis of variance versus an independent samples t-test.

A: Analysis of variance (ANOVA) is used when we have more than two independent samples whereas…

Q: A researcher measures the amount of food consumed by each dog in her lab. She finds that the mean…

A: In statistics, variance is the average squared distance of each data points from the population…

Q: which one is more precise sample variance or population variance

A: We want to tell you which one is more precise.

Q: Explain why the formulas for sample variance and population variance are different.

A: Here's the explanation is as follows; Sample Variance : It is used to calculate how varied a sample…

Q: What is formula for the variance of the population?

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Q: Explain the reason for the word variance in the phrase analysis of variance.

A: In probability theory and statistics, variance is the prediction that a random variable would…

Q: A sample of 30 distance scores measured in yards has a mean of 7, a variance of 16, and a standard…

A: Given statistics:Consider the variable x represents the distance scores in yards.The given…

Q: The average number of newspapers for sale in an airport newsstand is 12, and the variance is 25. The…

A: We have given that  Average and variance for newspapers.  Average = 12 Variance = 25 Standard…

Q: What is the range of the distribution? What is the value of the variance of the data set? What is…

A: We have to calculate the range, variance and SD of given dataset. Range = Maximum - minimum And SD…

Q: What is the variance of the data set 14,23,9,12,18,8

A: Given Data :  XX 14 23 9 12 18 8 Below table will be used to calculate variance :…

Q: Explain the variance of the sum or difference of the two variables X and Y ?

A: Variance of sum of two variables: The variance of the sum of two or more random variable is equal to…

Q: In data analysis, which of the two will you consider the most: Mean or variance? Discuss.

A: Mean is a central tendency,  sum of a collection of numerical data divided by the count of data in…

Q: If the correlation is .8, then 40% of the variance is explained?

A: The given statement is incorrect.

Q: what is the distribution of the coefficient of variation?

A: A coefficient of variance is used to determine the precision of an estimated value. It is primarily…

Q: What is the variance of a data set with mean score of 87.5 and a standard deviation of 2?

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Q: What is the mean and variance of a variable that follows the binomial distribution?

A: Let X be the random variable follows binomial distribution.  X ~ Binomial (n, p)

Q: The mean of the distribution of sample means would be equal to:

A: The mean of the distribution of sample means would be equal to ?

Q: In analysis of variance, the F-ratio is a ratio of

A: F ratio is a ratio of 2 variances or two mean squares. Mean squares are simple variances that…

Q: If a data set has 16 values and a standard deviation 9.4, then the variance is

A: Given information: A data set consists of n = 16 values. The value of the standard deviation is, s =…

Q: Once the correlation coefficient is known, how can we find the amount of the shared variance?

A: Concept:  correlation coefficient measures the degree of linear relationship between two variables.

Q: Can the measure of central tendency tell  a researcher how spread out the scores are in a…

A: Introduction:A measure of central tendency helps to identify the location of a dataset, whereas a…

Q: If the highest 8% of students in the final exam were rewarded. The mean for this exam was 120 & the…

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Q: If the probability of hitting an object is 0.8, what would the variance be?

A: Given problem Given that   If the probability of hitting an object is 0.8, what would the variance…