   # 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? 13th Edition
Anderson
Publisher: CENGAGE L
ISBN: 9781305881884

#### Solutions

Chapter
Section 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. 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?

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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