2 Points A Class Survey In A Large Class For First Year College Students Asked About How Many Minutes Do You Study O 1 (39.5 KiB) Viewed 68 times
(2 points) 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 281 students was * = 138 minutes. Suppose that we know that the studey time follows a Normal distribution with standard deviation 6 = 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) Can you conclude that students do claim to study more than two hours per weeknight on the average? (a) Ho: H: and "I" for .) (b) (Type in mu" as the substitute for #eid (c) Conclusion: (Answer with "Yes/Y" or "No/N".)
(1 point) 35 people are randomly selected and the accuracy of their wristwatches is checked, with positive errors representing watches that are ahead of the correct time and negative errors representing watches that are behind the correct time. The 35 values have a mean of 115sec and a standard deviation of 216sec. Use a 0.02 significance level to test the claim that the population of all watches has a mean of Osec. The test statistic is The P-value is The final conclusion is A. There is sufficient evidence to warrant rejection of the claim that the mean is equal to 0 B. There is not sufficient evidence to warrant rejection of the claim that the mean is equal to 0
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