Many people believe that the average number of Facebook friends is 140. The population standard deviation is 37.2. A random sample of 48 high school students in a particular county revealed that the average number of Facebook friends was 155. At ? = 0.10, is there sufficient evidence to conclude that the mean number of friends is greater than 140? State the hypotheses and identify the claim with the correct hypothesis. H0: ? (Choose one) H1: ? (Choose one) This hypotheses test is a (Choose one) test.
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Null hypothesis: H0: μ ≤ 140 (the mean number of Facebook friends is less than or equal to 140) Alternative hypothesis: Ha: μ > 140 (the mean number of Facebook friends is greater than 140) Claim: The claim is that the mean number of Facebook friends is greater Show more…
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Many people believe the average number of Facebook friends a person has is 150. The population standard deviation is 36.7. A random sample of 47 high school students in a particular city revealed that the average number of Facebook friends is 154. At the 0.10 significance level, is there enough evidence to conclude the mean number of Facebook friends is greater than 150? Write the null and alternative hypotheses. H0: H1: μ = 150; μ > 150 μ > 150; μ ≤ 150 μ = 150; μ < 150
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Many people believe that the average number of Facebook friends is 130. The population standard deviation is 38.1. A random sample of 45 people in a particular city zone revealed that the average number of Facebook friends was 147. At 0.10 level of significance, is there sufficient evidence to conclude that the mean number of friends is greater than 130? State the hypotheses. H0: μ = 130; Ha: μ > 130
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