4.Kiana is estimating the average height of UCI students.She wants the margin of error to be no bigger than a quarter of an inch.The standard deviation of height is four inches.Sarah also wants it to be a 99% confidence interval.How many students does she need in the sample?You need to explain every mathematical step you take.Do not post an image of your work.Type you answer into the answer box.You do not have to use mathematical symbols.

5.A researcher took a simple random sample of 81 observations from a population whose standard deviation is 36.The sample mean was 100.Please build a 95% confidence interval for the population mean.You need to explain every mathematical step you take.Do not post an image of your work.Type you answer into the answer box.You do not have to use mathematical symbols.

Please hurry. as soon as possible