Solve the problem. A final exam in Math 160 has a mean of 73 with standard deviation 7.8. Suppose 36 students are randomly selected. a) If 36 students are randomly selected, find the probability that the sum of their test scores is less than 2508. Round your answer to 4 decimal places. b) Find the 9th percentile for the sum of the 36 students' test scores. Round your answer to the nearest whole number.
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Solve the problem. Scores on the final exam in Math 160 have a mean of 73 and standard deviation of 7.8. If 24 students are randomly selected, find the probability that the mean of their test scores is less than 70. 0.0301 0.1006 0.9699 0.0278
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