A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was

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A Survey Was Conducted To Determine Whether Hours Of Sleep Per Night Are Independent Of Age A Sample Of Individuals Was 1 (65.64 KiB) Viewed 46 times

A survey was conducted to determine whether hours of sleep per night are independent of age. A sample of individuals was asked to indicate the number of hours of sleep per night with categorical options: fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more. Later in the survey, the individuals were asked to indicate their age with categorical options: age 39 or younger and age 40 or older. Sample data follow. Age Group Hours of Sleep 39 or younger 40 or older 38 36 Fewer than 6 6 to 6.9 7 to 7.9 58 55 77 75 8 or more 67 94 a (a) Conduct a test of independence to determine whether hours of sleep are independent of age. State the null and alternative hypotheses. O He: Hours of sleep per night is mutually exclusive from age. Hoi Hours of sleep per night is not mutually exclusive from age. He: Hours of sleep per night is not independent of age. He: Hours of sleep per night is independent of age. Ho: Hours of sleep per night is independent of age. H: Hours of sleep per night is not independent of age. OH,: The proportion of people who get 8 or more hours of sleep per night is not equal across the two age groups. H: The proportion of people who get 8 or more hours of sleep per night is equal across the two age groups. Find the value of the test statistic. (Round your answer to three decimal places.) What is the p-value? (Round your answer to four decimal places.) p-value = Using a 0.05 level of significance, what is your conclusion? Do not reject H. We cannot conclude that hours of sleep per night and age are not independent. Reject H . We conclude that hours of sleep per night and age are not independent. Do not reject He. We conclude that hours of sleep per night and age are not independent. Reject How We cannot conclude that hours of sleep per night and age are not independent (b) What is your estimate of the percentages of individuals who sleep fewer than 6 hours, 6 to 6.9 hours, 7 to 7.9 hours, and 8 hours or more per night? Fewer than 6 % % 6 to 6.9 7 to 7.9 % 8 or more %