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Sleep Time A person read that the average number of hours an adult sleeps on Friday night to Saturday morning was 7.2 hours. The researcher feels that college students do not sleep 7.2 hours on average. The researcher randomly selected 15 students and found that on average they slept 8.3 hours. The standard deviation of the sample is 1.2 hours. At a=0.05, is there enough evidence to say that college students do not sleep 7.2 hours on average? Assume that the population is approximately normally distributed. Use the critical value method and tables.

Sleep Time A person read that the average number of hours an adult sleeps on Friday night to Saturday morning was 7.2 hours. The researcher feels that college students do not sleep 7.2 hours on average. The researcher randomly selected 15 students and found that on average they slept 8.3 hours. The standard deviation of the sample is 1.2 hours. At a=0.05, is there enough evidence to say that college students do not sleep 7.2 hours on average? Assume that the population is approximately normally distributed. Use the critical value method and tables.

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Sleep Time A person read that the average number of hours an adult sleeps on Friday night to Saturday morning was 7.2 hours. The researcher feels that college students do not sleep 7.2 hours on average. The researcher randomly selected 15 students and found that on average they slept 8.3 hours. The standard deviation of the sample is 1.2 hours. At a=0.05, is there enough evidence to say that college students do not sleep 7.2 hours on average? Assume that the population is approximately normally distributed. Use the critical value method and tables. Part 1 of 5 ate the hypotheses and identify the daim. = 7.2|not claim claim Th bothesis test is a two-tailed test nd the critical value(s). Round the answer(s) to three decimal places. nere is more than one critical value, separate them with commas. Ctical valuet2145, 2.145)| Part:2/5 Part 3 of 5 (c) Compute the test value. Always round i score values to three decimal places. t =
Transcribed Image Text:Sleep Time A person read that the average number of hours an adult sleeps on Friday night to Saturday morning was 7.2 hours. The researcher feels that college students do not sleep 7.2 hours on average. The researcher randomly selected 15 students and found that on average they slept 8.3 hours. The standard deviation of the sample is 1.2 hours. At a=0.05, is there enough evidence to say that college students do not sleep 7.2 hours on average? Assume that the population is approximately normally distributed. Use the critical value method and tables. Part 1 of 5 ate the hypotheses and identify the daim. = 7.2|not claim claim Th bothesis test is a two-tailed test nd the critical value(s). Round the answer(s) to three decimal places. nere is more than one critical value, separate them with commas. Ctical valuet2145, 2.145)| Part:2/5 Part 3 of 5 (c) Compute the test value. Always round i score values to three decimal places. t =
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