Question

A trade organization reports that it's members have an average of 17.2 years of experience with a standard deviation of 6.0 years. To test this claim, you take a sample of 36 members and find that the average number of years of experience is 15.0 years.

Calculate the 95% confidence interval.

16.87 to 17.53

14.67 to 15.33

13.86 to 16.14

15.24 to 19.16

13.04 to 16.96

Is it reasonable to say that the actual years of experience is 17.2 based on the results of your sample?

yes

no

Answer 1