Compute the critical z value for the given confidence level. a) 90% confidence level, the critical z value is: z = b) 96% confidence level, the critical z value is: z =Diagnostic Tests: Uric Acid: Overproduction of uric acid in the body can be an indication of cell breakdown. this may be an advance indication of illness such as gout, leukemia or lymphoma. (Reference: Manual of Laboratory and Diagnostic Tests by F. Fischbach). Over a period of months, an adult make patient has taken eight blood tests for uric acid. The mean concentration was 5.35 mg/dL. The distribution of uric acid in healthy adult males can be assume to be normal, with population standard deviation of 1.85 mg/dL. Questions: a) Find the 95% confidence interval for the population mean concentration of uric acid in this patient's blood? Identify the calculator function that you are using and write the answer in the format: lower boundary