A computer scientist is investigating the usefulness of two different design lan

Question

A computer scientist is investigating the usefulness of two different design languages in improving programming tasks. Twelve expert programmers, familiar with both languages, are asked to code a standard function in both languages, and the time (in minutes) is recorded. The data follow:

(a) Is the assumption that the difference in coding time is normally distributed reasonable?

(b) Find a 95% confidence interval on the difference in mean coding times. Is there any indication that one design language is preferable?

Programmer Design Language 1 Design Language 2 1 17 18 2 15 14 3 21 18 4 14 11 5 18 23 6 24 21 7 16 10 8 14 13 9 21 19 10 23 24 11 13 15 12 18 20

Explanation / Answer

A computer scientist is investigating the usefulness of two different design lan

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