A research physician wants to estimate the average age of people with diabetes.

Question

A research physician wants to estimate the average age of people with diabetes. She takes a random sample of 35 diabetics and obtains the following ages:48,61,54,64,10,41,38,23,45,60,57,48,47,53,83,83,79,56,82,76,41,75,79,68,21,55,77,68,38,65,59,7,61,70,47.

a:find a 95%confidence interval for the mean age, u, of people with diabetes. Assume that o=21.2 years

b:obtain a normal probability plot, boxplot, histogram, and stem and leaf diagram of the data.

c:remove the outliers (if any) from the data and then repeat part a.

d.comment on the the advisability of using the z-interval procedure here.

PLEASE LIST ALL STEPS! thank you!

Explanation / Answer

A research physician wants to estimate the average age of people with diabetes.

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