A college admissions director wishes to estimate the mean age of all students currently enrolled. In a random sample of 23students, the mean age is found to be 23.7years. From past studies, the ages of enrolled students are normally distributed with a standard deviation of 10.1years. Construct a 90% confidence interval for the mean age of all students currently enrolled.

1. The critical value:

Incorrect.

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2. The standard deviation of the sample mean:

Incorrect.

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3. The margin of error:

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4. The lower limit of the interval:

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5. The upper limit of the interval:

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