hypotheses, z value, z test value

FratBro23
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Statistics
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hypotheses, z value, z test value 

Many people believe that the average number of Facebook friends is 130. The population standard deviation is 38.2. A random sample of 50 high school students in a particular county revealed that the average number of Facebook friends was 162. At α = 0.05, is there sufficient evidence to conclude that the mean number of friends is greater than 130?

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(Top Tutor) Daniel C.
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