A class survey in a large class for first-year college students asked, About how many minutes...

  

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A class survey in a large class for first-year college students asked, "About how many minutes do you study on a typical weeknight?" The mean response of the 160 students was x = 135 minutes. Suppose that we know that the study time follows a Normal distribution with standard deviation = 65 minutes in the population of all first-year students at this university. Regard these students as an SRS from the population of all first-year students at this university. Does the study give good evidence that students claim to study more than 2 hours per night on the average? (a) State null and alternative hypotheses in terms of the mean study time in minutes for the population. (b) What is the value of the test statistic z? (c) What is the P-value for this test? (d) Can you conclude that students do claim to study more than two hours per weeknight on the average? (a) Ho: mu!=135 Ha: mu!=135 (Type in "mu" as the substitute for and "!=" for .) (b) z: (c) P-value: (d) Conclusion: (Answer with "Yes/Y" or "No/N".) A class survey in a large class for first-year college students asked, "About how many minutes do you study on a typical weeknight?" The mean response of the 160 students was x = 135 minutes. Suppose that we know that the study time follows a Normal distribution with standard deviation = 65 minutes in the population of all first-year students at this university. Regard these students as an SRS from the population of all first-year students at this university. Does the study give good evidence that students claim to study more than 2 hours per night on the average? (a) State null and alternative hypotheses in terms of the mean study time in minutes for the population. (b) What is the value of the test statistic z? (c) What is the P-value for this test? (d) Can you conclude that students do claim to study more than two hours per weeknight on the average? (a) Ho: mu!=135 Ha: mu!=135 (Type in "mu" as the substitute for and "!=" for .) (b) z: (c) P-value: (d) Conclusion: (Answer with "Yes/Y" or "No/N".)

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a Null Hypothesis Ho 120 minutes Alternative Hypothesis Ha 120 minutes b The ... View the full answer