Question

9.798572831
20.41055197
18.02715762
17.47409767
15.51851785
15.03302432
15.38773953
14.30763659
13.02682387
12.32416479
12.10124963
22.74141596
17.01365308
19.94086453
14.7554498
10.99235124
9.179639211
14.45607555
14.16497547
13.96428288
12.96435014
9.512533387
18.94533843
11.62326224
11.33413764
14.86991548
12.19591028
15.17614669
16.81712752
10.13084605
16.66093593
8.199420536
16.00636852
17.95577074
17.96712839
17.00530851
18.55375088
12.96917258
14.21313937
16.42371039
12.83344305
15.37141693
13.29120686
18.49069297
15.44192477
14.72976758
22.02444971
12.98347225
16.7011326
19.01058568
14.38674177
9.867464509
18.24611108
14.54480523
16.40749982
13.34628228
16.6305407
13.48889144
18.90767292
12.80867098
12.98485601
14.14328482
10.14041816
18.49107767
15.65035745
17.06186298
15.48668296
20.43791244
13.30323661
10.18882615
8.554274414
17.35612603
10.70903772
17.28899825
15.46298207
17.83512956
16.24922776
15.22736631
19.87142754
16.19724295
12.39291498
11.36163535
11.47476172
14.38229042
13.21350714
10.99328777
18.87467648
14.45369979
15.36565636
20.23687616
14.19309776
12.4789187
14.47429321
13.2229113
13.80526117
9.545112114
15.31727571
20.08307331
14.01289088
13.37207856
14.63994617
8.076741659
16.16598986
16.27114726
15.35696126
14.49804397
12.74102344
17.02282573
14.33924271
12.22382014
15.14578587
12.20580526
17.98752307
16.94325129

There are 114 values that represent the number of hours worked by a randomly drawn sample of undergraduate students.

1. Compute a 99% confidence interval for the expected number of hours worked by undergraduate students. Show your working.
2. Interpret the confidence interval.
3. Do you need to make any assumptions in order for your confidence interval to be valid?

Answer 1

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