If the Standard Deviation of X Is 15,the Covariance of X

question 44

True/False

If the standard deviation of X is 15,the covariance of X and Y is 94.5,the coefficient of correlation r = 0.90,then the variance of Y is 7.0.

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Definitions:

Sample Sizes

The number of observations or subjects included in a study from which conclusions are drawn.

Test Statistic

A calculated value from sample data, used in statistical hypothesis testing to determine whether to reject the null hypothesis.

Random Samples

A subset of individuals chosen from a larger set, where each individual has an equal chance of being selected.

Rejected

In statistical analysis, refers to the decision to discard the null hypothesis based on the evidence from sample data and the predetermined significance level.