A university is interested in the average age of its students. A simple random sample of 30 students was selected. The following descriptive statistics for their ages were compted: x̄ =20.8 and s^2=8.4. What is a point estimate of the population standard deviation for age?

A university is interested in the average age of its students. A simple random sample of 30 students was selected. The following descriptive statistics for their ages were compted: x̄ =20.8 and s^2=8.4. What is a point estimate of the population standard deviation for age?

A university is interested in the average age of its students. A simple random sample of 30 students was selected. The following descriptive statistics for their ages were compted: x̄ =20.8 and s^2=8.4. What is a point estimate of the population standard deviation for age?


a. 8.4

b. 20.8

c. 70.6

d. 2.9


Answer: d. 2.9


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