16.39 Executives learn Spanish.
A matched pairs study of the effect of a language institute on the ability of executives to comprehend spoken Spanish had these improvements in scores between the pretest and the posttest for 20 executives:
spnish1
| −1 | 2 | 1 | 4 | −4 | −5 | −3 | 3 | 5 | 5 |
| 2 | −1 | 3 | 3 | −2 | 7 | 2 | 4 | 1 | 3 |
(Exercise 7.34, page 377, shows the actual pretest and posttest scores.) Show the assignment of ranks and the calculation of the signed rank statistic for these data.
16.39
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