The Number of Hours Per Week That High School Students $\overline{ y}$

question 24

Multiple Choice

The number of hours per week that high school students spend on homework is normally distributed,with a mean of 12 hours and a standard deviation of 3 hours.50 students are chosen at random.Let $\overline{ y}$ represent the mean number of hours spent on homework for this group.Find the probability that $\overline{ y}$ is between 10.8 and 13.0.

• A)0.0078
• B)0.286
• C)0.9886
• D)0.4711
• E)0.0143

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