10.39 The following data represent the running times of films produced by two motion-picture companies: Company 1 Time (minutes) 86 98 109 92 81 165 102 2 97 134 92 87 114 Test the hypothesis that the average running time of films produced by company 2 exceeds the average run- ning time of films produced by company 1 by 10 min- utes against the one-sided alternative that the differ- ence is less than 10 minutes. Use a 0.1 level of sig- nificance and assume the distributions of times to be approximately normal with unequal variances.

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