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Many people believe that the average number of Facebook friends is 140. The population standard deviation is 38.5. A random sample of 48 high school

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Many people believe that the average number of Facebook friends is 140. The population standard deviation is 38.5. A random sample of 48 high school students in a particular county revealed that the average number of Facebook friends was 147. At a= 0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 1407 Part: 0 / 5 Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. Ho : (Choose one) V not claim H, : D=0 0+0 This hypotheses test is a (Choose one) V test. X 5 one tailed or 2 tailed Part: 1 / 5 Part 2 of 5 Find the critical value(s). Round the answer to two decimal places. If there is more than one critical value, separate them with commas. Critical value(s): X 5 Part: 2 / 5 Part 3 of 5 Compute the test value. Always round z score values to two decimal places. X Part 4 of 5 Make the decision. (Choose one) V the null hypothesis. Do not reject X 5 Reject Part 5 of 5 Summarize the results. There (Choose one) Vienough evidence to support the claim that the mean number of Facebook friends is greater than X 5 140. is not

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