The times that college students spend studying per week have a distribution skewed to the left with a mean of 7.4 hours and a standard deviation of 2.4 hours. Find the probability that the mean time spent studying per week for a random sample of 55 college students would be a. between 6.9 and 7.6 hours. Round your answer to two decimal places. P = b. less than 7.2 hours. Round your answer to two decimal places. P =
Added by Angela J.
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9 - 7.4) / (2.4 / √55) = -1.55 Upper bound: Z = (7.6 - 7.4) / (2.4 / √55) = 1.62 Show more…
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