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A random sample of 36 students at a community college showed an average age of 23 years. Assume the ages of all students at the

A random sample of 36 students at a community college showed an average age of 23 years. Assume the ages of all students at the college are normally distributed with a standard deviation of 1.9 years. The 98% confidence interval for the average age in years of all students at this college is _____.

a. 22.263 to 23.737
b. 21.100 to 24.900
c. 22.228 to 23.772
d. 22.350 to 23.650

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