Question

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 are contained in the Excel Online file below. Construct a spreadsheet to answer the following questions. Open spreadsheet a. Provide a point estimate of the population mean number of weeks it takes a worker aged 55 plus to find a job. weeks (to whole number) b. At 95% confidence, what is the margin of error? Please round the answer to four decimal places. (to 4 decimals) c. What is the 95% confidence interval estimate of the mean? Please round the answer to two decimal places. ( , ) weeks

Answer 1

34

Explanation:

?

Answer 2

Explanation:

Sample mean = 21

Standard deviation = 15.255

Confidence level = 0.95

Significance level = 0.05

Sample size = 40

Margin of Error = 4.73

CL Lower limit = 15.9975

CL = Upper Limit = 25.45