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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?

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STATISTICS F/BUSINESS+ECONOMICS-TE...

13th Edition
Anderson
Publisher: CENGAGE L
ISBN: 9781305881884

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Chapter
Section
BuyFindarrow_forward

STATISTICS F/BUSINESS+ECONOMICS-TE...

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
  1. a. Compute the mean and median percentage of hourly employees being laid off at these stores.
  2. b. Compute the first and third quartiles.
  3. c. Compute the range and interquartile range.
  4. d. Compute the variance and standard deviation.
  5. e. Do the data contain any outliers?
  6. 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.

Explanation of Solution

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.

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Chapter 3 Solutions

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