Question: Over a period of months a male patient has taken eight blood tests for uric acid. The mean concentration was 5.35 mg/dl. The distribution of uric acid in healthy males can be assumed to be normal with o= 1.85 mg/dl

(a) Find a 95% confidence interval for the population mean concentration of uric acid in this patient’s blood. What is the margin of error?

(b) What conditions are necessary for your calculations?

(c) Give a brief interpretation of your results in the context of this problem.

(d) Find the sample size necessary for a 95% confidence level with maximal error of estimate E= 1.10 for the mean concentration of uric acid in this patients blood.