2
QuizMultiple Choice

Hypothesis Testing

Question 2 • AZ-Common Core Algebra II B

Suppose the mean of a normally distributed population is 300, and 200 simple random samples are drawn from the population. At a 68% confidence level, (one standard deviation from the mean), about how many of the samples’ confidence intervals would you expect to contain the population mean?

Answer
A
64
B
96
C
136
D
204

Explanation

A 68% confidence level means we expect about 68% of the confidence intervals to contain the population mean. Calculate 0.68 × 200 = 136, so about 136 intervals would contain the mean.

AI-written and checked against the verified answer.

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