3. (Example 3) Suppose a random sample of 45 male firefighters are tested for plasma volume. The sample %3D mean of x = 37.5 ml/kg (milliliters plasma per kilogram of body weight). Assume o = 7.50...

Extracted text: 3. (Example 3) Suppose a random sample of 45 male firefighters are tested for plasma volume. The sample %3D mean of x = 37.5 ml/kg (milliliters plasma per kilogram of body weight). Assume o = 7.50 ml/kg. Find the sample size necessary for a 99% confidence level with maximum error of the estimate E=2.50 ml/kg for the mean plasma volume in male firefighters. (Reference: Manual of Laboratory and Diagnostic Tests, F. Fischbach).