Many people believe that the average number of Facebook friends is 135. The population standard deviation is 36.6. A random sample of 35 high school students in a particular county revealed that the average number of Facebook friends was 155. At α=0.10, is there sufficient evidence to conclude that the mean number of friends is greater than 135? H0=___ H1=____ This hypothesis test is a (Choose one) test.
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H0 (null hypothesis): The mean number of Facebook friends is 135. H1 (alternative hypothesis): The mean number of Facebook friends is greater than 135. This hypothesis test is a one-tailed test because we are only interested in whether the mean number of Show more…
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Many people believe that the average number of Facebook friends is 120. The population standard deviation is 37.8. A random sample of 39 high school students in a particular county revealed that the average number of Facebook friends was 147. At =α0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 120? State the hypotheses and identify the claim with the correct hypothesis.
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