Question1: The following data was collected from a simple random sample of a population.

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The point estimate of the population standard deviation is_____________

Question2:

A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years. We want to determine if the average age of all the students at the university is significantly more than 24. Assume the distribution of the population of ages is normal. Using = .05, it can be concluded that the population mean age is

A) not significantly different from 24.

B) significantly different from 24

C) significantly less than 24

D) significantly more than 24

Question 3:

A local university administers a comprehensive examination to the recipients of a B.S. degree in Business Administration. A sample of 5 examinations is selected at random and scored. The scores are shown below. Assume the population is normally distributed.

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At 95% confidence, determine an interval for the mean of the population.

Lower Bound________

Upper Bound________

The error of rejecting a true null hypothesis is_________