The Office of Student Services at a Large Western State

question 16

Multiple Choice

The Office of Student Services at a large western state university maintains information on the study habits of its full-time students. Their studies indicate that the mean amount of time undergraduate students study per week is 20 hours. The hours studied follows the normal distribution with a population standard deviation of six hours. Suppose we select a random sample of 144 current students. What is the probability that the mean of this sample is between 19.25 hours and 21.0 hours?

• A)0.9544
• B)0.0160
• C)0.0986
• D)0.9104

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