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Older people often have a hard time finding work. AARP reported on the number of weeks it takes a worker aged 55 plus to find a job. The data on number of weeks spent searching for a job contained in the file JobSearch are consistent with the AARP findings. a. Provide a point estimate of the population mean number of weeks it takes a worker aged 55 plus to find a job. b. At 95% confidence, what is the margin of error? c. What is the 95% confidence interval estimate of the mean? d. Discuss the degree of skewness found in the sample data. What suggestion would you make for a repeat of this study?

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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 8.2, Problem 18E
Textbook Problem
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Older people often have a hard time finding work. AARP reported on the number of weeks it takes a worker aged 55 plus to find a job. The data on number of weeks spent searching for a job contained in the file JobSearch are consistent with the AARP findings.

  1. a. Provide a point estimate of the population mean number of weeks it takes a worker aged 55 plus to find a job.
  2. b. At 95% confidence, what is the margin of error?
  3. c. What is the 95% confidence interval estimate of the mean?
  4. d. Discuss the degree of skewness found in the sample data. What suggestion would you make for a repeat of this study?

a.

To determine

Find the point estimate of the population mean number of weeks it takes a worker aged 55 plus to find a job.

Explanation of Solution

Calculation:

The given data shows that the number of weeks spent searching for a job.

The sample mean x¯ is an estimate of the population mean.

Software Procedure:

Step-by-step procedure to obtain the mean value using the MINITAB software:

  • Choose Stat > Basic Statistics > Display Descriptive Statistics.
  • In Variables enter the columns Job Search Time (Weeks)

b.

To determine

Find the margin of error.

c.

To determine

Find the 95% confidence interval for population mean.

d.

To determine

Discuss the degree of skewness found in the sample data.

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Chapter 8 Solutions

STATISTICS F/BUSINESS+ECONOMICS-TEXT
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