Pharmacology Suppose we want to estimate the concentration (ug/mL) of a specific dose of ampicillin in the urine after various pe- riods of time. We recruit 25 volunteers who have received ampicillin and find they have a mean concentration of 7.0 ug/mL with a standard deviation of 2.0 ug/mL. Assume the underlying population distribution of concentrations is normally distributed. *6.30 Find a 95% Cl for the population mean concentration. *6.31 Find a 99% CI for the population variance of the concentrations. bn 8.8 *6.32 How large a sample would be needed to ensure that the length of the Cl in Problem 6.30 is 0.5 ug/mL assuming the sample standard deviation remains at 2.0 μg/mL?

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