Constructing Confidence Intervals In Exercises 17 and 18, youare given the sample mean and the sample standard deviation. Assumethe variable is normally distributed and use a normal distributionor a t-distribution to construct a 90% confidence interval for thepopulation mean u. If convenient, use technology to construct theconfidence intervals.
(a) In a random sample of 10 adults from the United States, themean waste generated per person per day was 4.54 pounds and thestandard deviation was 1.21 pounds. (b) Repeat part (a), assumingthe same statistics came from a sample size of 500. Compare theresults. (Adapted from U.S. Environmental Protection Agency)
answer
a
b
