For Exercises perform each of the following steps.
a. State the hypotheses and identify the claim.
b. Find the critical value(s).
c. Compute the test value.
d. Make the decision.
e. Summarize the results.

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?

Transcribed Image Text:

178 61 30 29 41 31 24 25 24 22 122 56 28 16 38 30 16 25 23 21 91 46 28 16 36 19 15 18 17 20 44 20 20 19 15 19 15 14 17 17 35 32 27 15 25 19 19 15 22 20