A computer scientist is investigating the usefulness of two different design languages in improving programming tasks. Twelve expert programmers who are familiar with both languages are asked to code a standard function in both languages and the time (in minutes) is recorded. The data follow: Time Programmer DL 1 DL 2 1 17 18 2 16 14 3 21 19 4 14 11 5 18 23

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A computer scientist is investigating the usefulness of two different design languages in
improving programming tasks. Twelve expert programmers who are familiar with both
languages are asked to code a standard function in both languages and the time (in minutes) is
recorded. The data follow:
Time
Programmer DL 1
DL 2
1
17
18
2
16
14
3
21
19
4
14
11
5
18
23
III
6
24
21
7
16
10
8
14
13
9
21
19
10
23
24
11
13
15
12
18
20
Find a 95% confidence interval on the difference in mean coding times. Is there any indication
that one design language is preferable?
Transcribed Image Text:A computer scientist is investigating the usefulness of two different design languages in improving programming tasks. Twelve expert programmers who are familiar with both languages are asked to code a standard function in both languages and the time (in minutes) is recorded. The data follow: Time Programmer DL 1 DL 2 1 17 18 2 16 14 3 21 19 4 14 11 5 18 23 III 6 24 21 7 16 10 8 14 13 9 21 19 10 23 24 11 13 15 12 18 20 Find a 95% confidence interval on the difference in mean coding times. Is there any indication that one design language is preferable?
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