Total plasma volume is important in determining the required plasma component in

Question

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 an average plasma volume of 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume the population standard deviation is 7.50 ml/kg for the distribution of blood plasma. Determine the 99% confidence interval for the population mean blood plasma volume in male firefighters. Round to 3 decimal places. Determine the parameter to estimate: population mean or population proportion. (circle 1) Determine the point estimate. Determine the type of standard deviation given. State "sample", "populations" nor "none". Sample If you stated either sample or population, give the value of the standard deviation. 7.5

Explanation / Answer

Here, n =45 , mean = 37.5, s = 7.5

At 99% confidence interval z value = 2.576

CI = mean + /- z * s / sqrt(n)

= 37.5 + / - 2.576 * (7.5 / sqrt(45))

= (34.62 , 40.38)

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