The Office of Student Services at a Large Western State

question 33

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 less than 19.25 hours?

• A)0.4332
• B)0.8664
• C)0.0668
• D)0.0181

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Definitions:

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A theoretical approach in the social and natural sciences that examines the psychological structures from the perspective of evolution and adaptation.

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A steroid hormone associated with the development of male secondary sexual characteristics, muscle mass, and bone density, also affecting mood.