### Confidence interval-population mean concentration of uric

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Over a period of months an adult male patient has taken eight blood tests for uric acid. The mean concentration iswas x with a line over it =5.35 mg/dl. The distribution of uric acid for the health adult male can be assumed to be normal with the standard deviation of 1.85 mgdl.

a. Find a 95% confidence interval for the population mean concentration of uric acid in this patients blood. What is the margin of error?

b. What conditions are necessary for the calculations?

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

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

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