6. The times that college students spend studying per week have a distribution that is skewed to the right with a mean of 8.4 hours and a standard deviation of 2.7 hours. Find the probability that the mean time spent studying per week for a random sample of 45 students would be: a. Between 8 and 9 hours b. Less than 8 hours c. What is the shape of the sampling distribution if a random sample of 12 is used? Can you determine the mean and standard deviation of this sampling distribution? If so, what are they?
Added by Scott H.
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Z1 = (8 - 8.4) / (2.7 / √45) = -0.99 Z2 = (9 - 8.4) / (2.7 / √45) = 1.32 Show more…
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