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Many people believe that the average number of Facebook friends is 120. The population standard deviation is 39.2. A random sample of 47 high school students in a particular county revealed that the average number of Facebook friends was 145. At a = 0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 120? Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. Hotu = 120 not claim Hu> 120 claim This hypotheses test is a one-tailed ▼ test. Part: 1/5 Part 2 of 5 0.0 ▼ 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 ▼ S

Many people believe that the average number of Facebook friends is 120. The population standard deviation is 39.2. A random sample of 47 high school students in a particular county revealed that the average number of Facebook friends was 145. At a = 0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 120? Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. Hotu = 120 not claim Hu> 120 claim This hypotheses test is a one-tailed ▼ test. Part: 1/5 Part 2 of 5 0.0 ▼ 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 ▼ S

Calculus For The Life Sciences
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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Many people believe that the average number of Facebook friends is 120. The population standard deviation is 39.2. A random sample of 47 high school students in a particular county revealed that the average number of Facebook friends was 145. At a = 0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 120? Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. Hoμ = 120 H₁>120 claim This hypotheses test is a one-tailed Part: 1 / 5 not claim ▼ Part 2 of 5 ▼test. 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 S
Transcribed Image Text:Many people believe that the average number of Facebook friends is 120. The population standard deviation is 39.2. A random sample of 47 high school students in a particular county revealed that the average number of Facebook friends was 145. At a = 0.01, is there sufficient evidence to conclude that the mean number of friends is greater than 120? Part 1 of 5 State the hypotheses and identify the claim with the correct hypothesis. Hoμ = 120 H₁>120 claim This hypotheses test is a one-tailed Part: 1 / 5 not claim ▼ Part 2 of 5 ▼test. 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 S
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Calculus For The Life Sciences
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