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20. An organization claims that teenagers spend on average 6.5 hours per week on the phone. To test this claim, ule organization randomly selected 40 teenagers and asked them about the weekly hours they spend on the phone. The sample mean was 7 hours with a sample standard deviation of 2 hours. Conduct a hypothesis testing for the organization's claim at 1% level of significance. A We must reject HO since the test statistic is -1.58 and the critical values are F1.960 B We must reject HO since the test statistic is +1.58 and the critical values are F1.960 C We don't reject HO since the test statistic is -1.58 and the critical values are F2.575 We don't reject HO since the test statistic is +1.58 and the critical values are F2.575 D

20. An organization claims that teenagers spend on average 6.5 hours per week on the phone. To test this claim, ule organization randomly selected 40 teenagers and asked them about the weekly hours they spend on the phone. The sample mean was 7 hours with a sample standard deviation of 2 hours. Conduct a hypothesis testing for the organization's claim at 1% level of significance. A We must reject HO since the test statistic is -1.58 and the critical values are F1.960 B We must reject HO since the test statistic is +1.58 and the critical values are F1.960 C We don't reject HO since the test statistic is -1.58 and the critical values are F2.575 We don't reject HO since the test statistic is +1.58 and the critical values are F2.575 D

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 1GP
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20. An organization claims that teenagers spend on average 6.5 hours per week on the phone. To test this claim, ule organization randomly selected 40 teenagers and asked them about the weekly hours they spend on the phone. The sample mean was 7 hours with a sample standard deviation of 2 hours. Conduct a hypothesis testing for the organization's claim at 1% level of significance. A We must reject HO since the test statistic is -1.58 and the critical values are F1.960 B We must reject HO since the test statistic is +1.58 and the critical values are F1.960 C We don't reject HO since the test statistic is -1.58 and the critical values are F2.575 We don't reject HO since the test statistic is +1.58 and the critical values are F2.575 D
Transcribed Image Text:20. An organization claims that teenagers spend on average 6.5 hours per week on the phone. To test this claim, ule organization randomly selected 40 teenagers and asked them about the weekly hours they spend on the phone. The sample mean was 7 hours with a sample standard deviation of 2 hours. Conduct a hypothesis testing for the organization's claim at 1% level of significance. A We must reject HO since the test statistic is -1.58 and the critical values are F1.960 B We must reject HO since the test statistic is +1.58 and the critical values are F1.960 C We don't reject HO since the test statistic is -1.58 and the critical values are F2.575 We don't reject HO since the test statistic is +1.58 and the critical values are F2.575 D
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