1. Many people believe that the average number of Facebook friends is 135. The population standard deviation is 36.4. A random sample of 36 high school students in a particular county revealed that the average number of Facebook friends was 148. At $\alpha = 0.05$, is there sufficient evidence to conclude that the mean number of friends is greater than 135? Write down all your steps in this hypothesis test and your conclusion.
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Alternative hypothesis (Ha): The mean number of Facebook friends is greater than 135. Show more…
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