Question

1. Total plasma volume is important in determining the required plasma component in blood

replacement therapy for a person undergoing surgery. Plasma volume is influenced by the

overall health and physical activity of an individual. Suppose that a random sample of 45

male firefighters are tested and that they have a plasma volume sample mean of 37.5

ml/kg (milliliters plasma per kilogram body weight). Assume that σ = 7.10 ml/kg for the

distribution of blood plasma.

(a) Find a 99% confidence interval for the population mean blood plasma volume in male

firefighters. What is the margin of error?

(b) Interpret your results in the context of this problem.

(c) Find the sample size necessary for a 99% confidence level with maximal margin of

error E = 2.00 for the mean plasma volume in male firefighte

Answer 1