A Random Sample of 250 Students at a University Finds $15.8 \pm .010$

question 79

Multiple Choice

A random sample of 250 students at a university finds that these students take a mean of 15.8 credit hours per quarter with a standard deviation of 2.3 credit hours. Estimate the mean credit
Hours taken by a student each quarter using a 90% confidence interval. Round to the nearest
Thousandth.

• A) \(15.8 \pm .010\)
• B) \(15.8 \pm .158\)
• C) \(15.8 \pm .239\)
• D) \(15.8 \pm .015\)

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