Question

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?

Short answer

Mean $=4$hours

Standard deviation $=1.2$hours

Sample size $=16$.

Step-by-step solution

Given Information

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

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.