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.

Confidence Level: 0.95

Job Search Time (Weeks):

10
50
7
3
10
17
6
27
1
14
19
11
13
2
0
40
6
16
52
25
44
24
22
7
39
11
9
24
44
42
24
46
24
19
30
13
10
28
33
5

A. At 95% confidence, what is the margin of error? Please round the answer to four decimal places

B.  What is the 95% confidence interval estimate of the mean? Please round the answer to two decimal places.

Answer 1

Find sampe mean and standard deviation:

Formula Ref:

Confidence interval: (Refer column F for detailed formula used for calculation)

margin of error: 4.5822

95% confidence interval estimate of the mean:

Lower limit: 16.09

Upper limit: 25.26