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13th Edition

Anderson

Publisher: CENGAGE L

ISBN: 9781305881884

Chapter 3.3, Problem 45E

Textbook Problem

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*The Wall Street Journal* reported that Walmart Stores inc. is planning to lay off 2300 employees at its Sam’s Club warehouse unit. Approximately half of the layoffs will be hourly employees (*The Wall Street Journal*, January 25–26, 2014). Suppose the following data represent the percentage of hourly employees laid off for 15 Sam’s Club stores.

55 | 56 | 44 | 43 | 44 | 56 | 60 | 62 | 57 | 45 | 36 | 38 | 50 | 69 | 65 |

- a. Compute the mean and median percentage of hourly employees being laid off at these stores.
- b. Compute the first and third quartiles.
- c. Compute the range and interquartile range.
- d. Compute the variance and standard deviation.
- e. Do the data contain any outliers?
- f. Based on the sample data, does it appear that Walmart is meeting its goal for reducing the number of hourly employees?

**a.**

To determine

Find the mean and median percentage of hourly employees being laid off at these stores.

**Calculation:**

The given information is that the data represent the percentage of hourly employees laid off for 15 Sam’s Club stores.

**Software Procedure:**

Step by step procedure to obtain the mean and median using the MINITAB software:

- Choose
**Stat > Basic Statistics > Display Descriptive Statistics**. - In
**Variables**enter the columns**Variable**...

**b.**

To determine

Find the first and third quartiles.

**c.**

To determine

Find the range and interquartile range.

**d.**

To determine

Find the variance and standard deviation.

**e.**

To determine

Check whether there are any outliers.

**f.**

To determine

Check whether it appears that Walmart is meeting its goal for reducing the number of hourly employees based on the sample data.

STATISTICS F/BUSINESS+ECONOMICS-TEXT

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