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Compute the test value. Always round z score values to two decimal places. 2 3 4 5 6 7 8 Many people believe that the

Compute the test value. Always round z score values to two decimal places.
2 3 4 5 6 7 8 Many people believe that the average number of Facebook friends is 145. The population standard deviation is 37.5. A random sample of 31 high school students in a particular county revealed that the average number of Facebook friends was 167. At a=0.05, is there sufficient evidence to conclude that the mean number of friends is greater than 145

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