5) A group of 196 psychology subjects took an intelligence exam and generated a mean score of 60 and a variance 256. a) Test the hypothesis that the true mean score is at least 62 with 10% significance.

A First Course in Probability (10th Edition)
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Author:Sheldon Ross
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5) A group of 196 psychology subjects took an intelligence exam and
generated a mean score of 60 and a variance 256.
a) Test the hypothesis that the true mean score is at least 62 with 10%
significance.
b) Another demographic group of 196 had a mean score of 62 with variance
196. Test the hypothesis with 10% significance that the mean intelligence of
the first population is larger than the mean of this new demographic.
Transcribed Image Text:5) A group of 196 psychology subjects took an intelligence exam and generated a mean score of 60 and a variance 256. a) Test the hypothesis that the true mean score is at least 62 with 10% significance. b) Another demographic group of 196 had a mean score of 62 with variance 196. Test the hypothesis with 10% significance that the mean intelligence of the first population is larger than the mean of this new demographic.
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