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Q. 1

Expert-verified
Found in: Page 426

### Introductory Statistics

Book edition OER 2018
Author(s) Barbara Illowsky, Susan Dean
Pages 902 pages
ISBN 9781938168208

# Use the following information to answer the next six exercises: 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 $X$ be the random variable representing the time it takes her to complete one review. Assume $X$ is normally distributed. Let $X$ be the random variable representing the mean time to complete the 16 reviews. Assume that the 16 reviews represent a random set of reviews.1. What is the mean, standard deviation, and sample size?

Mean $=4$ hours

Standard deviation $=1.2$ hours

Sample size $=16$.

See the step by step solution

## Step 1: Given Information

Mean, sample size, standard deviation are the statistical terms used for measuring problems in statistics.

## Step 2: Explanation

• The mean directs to the average of a group of values. The mean can be calculated in several ways, including the simple arithmetic mean the geometric mean, and the harmonic mean.
• A standard deviation remains a measurement of how distributed the details are about the mean. There are two types of standard deviation.

A low standard deviation indicates data are bunched close to the mean, and high standard deviation points data are more spread out.

• The sample size means a phrase utilized in market analysis for determining the number of subjects contained in a sample size.