Question: In the following situation, assume the random variable is normally distributed and use a normal distribution or a t- distribution to construct a 90% confidence interval for the population mean. If convenient, use technology to construct the confidence intervals.

(a) In a random sample of 10 adults from a nearby county, the mean waste generated per person per day was 3.65 pounds and the standard deviation 1.96 pounds.

(b) Repeat part (a), assuming the same statistics came from a sample size of 400. Compare the results.

(a) For the sample of 10 adults, the 90% confidence interval is -------- (Round to two decimal places as needed)