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:

Mitosis

A type of cell division resulting in two daughter cells each having the same number and kind of chromosomes as the parent nucleus.

Prokaryotes

Microorganisms characterized by the absence of a distinct nucleus, including bacteria and archaea.

Telomeres

Protective cap-like structures at the ends of chromosomes that prevent the loss of genetic information during cell division.

Aging

The process of becoming older, a series of biological changes that occur in living organisms over time.