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Q.1

Expert-verifiedFound in: Page 426

Book edition
OER 2018

Author(s)
Barbara Illowsky, Susan Dean

Pages
902 pages

ISBN
9781938168208

What is the mean, standard deviation, and sample size?

The mean time for each review is$4$ hours and standard deviation is $1.2$ hours and sample size is$16.$

Given in the question that, Yoonie is a personnel manager in a large corporation. Each month she must review $16$ of the employees. From past experience, she has found that the reviews take her approximately four hours each to do with a population standard deviation of $1.2$ hours. Let${\rm X}$ be the random variable representing the time it takes her to complete one review. Assume${\rm X}$is normally distributed. Let $\overline{x}$be the random variable representing the mean time to complete the $16$ reviews. Assume that the $16$ reviews represent a random set of reviews.

According to the supplied facts, the manager reviews $16$ employees each month. And reviews time is approximately 4 hours for each review with a population standard deviation of $1.2$ hours. Thus, the meantime for each review is $4$ hours and the standard deviation is$1.2$ hours, and sample size is $16.$

The meantime for each review is $4$hours and the standard deviation is $1.2$ hours, and sample size is $16.$

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