Free Response Show all your work. Indicate clearly the methods you use. because

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Free Response Show all your work. Indicate clearly the methods you use. because you will be graded on the correctness of your methods as well as on the accuracy and completeness of your results and explanations. A study of college freshmen's study habits found that the time (in hours) that freshmen use to study each week follows a distribution with a mean of 7-2 hours arid a standard deviation of 5.3 hours. Can you calculate the probability that a randomly chosen freshman studies more than 9 hours? If so. do it. If not. explain why not. What is the shape of the sampling distribution of the mean for samples of 55 randomly selected freshmen? Justify your answer. What are the mean and standard deviation for the mean number of hours spent studying by an SRS of 55 freshmen? Find the probability that the average number of hours spent studying by an SRS of 55 students is greater than 9 hours. Show your work.

Explanation / Answer

Advanced Placement Statistics (AP Statistics, AP Stat or AP Stats) is a college-level high school statistics course offered in the United States through the College Board's Advanced Placement program. This course is equivalent to a one semester, non-calculus-based introductory college statistics course and is normally offered to juniors and seniors in high school. One of the College Board's more recent additions,[1] the AP Statistics exam was first administered in May 1996 to supplement the AP program's math offerings, which had previously consisted of only AP Calculus AB and BC.[2] In the United States, enrollment in AP Statistics classes has increased at a higher rate than in any other AP class.[3] Students may receive college credit or upper-level college course placement upon the successful completion of a three-hour exam ordinarily administered in May. The exam consists of a multiple choice section and a free response section that are both 90 minutes long. Each section is weighted equally in determining the students' composite scores.

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