total plasma volume is important in determining the required plasma component in blood replacement therapy for personal growth and surgery plasma volume is influenced by the overall health and physical activity of an individual suppose that a random sample 50 male firefighters are tested in that they have a plasma volume sample mean of x=37.5 ml/kg assume thqy o=7.20 ml/kg for the distribution of blood plasma  A) when finding an 99% confidence interval, what is the critical value for confidence level? (Give your answer to two decimal places.)  B) find the sample size necessary for a 99% confidence level with maximal margin of error E= 2.10 for the mean plasma volume in male firefighters round to nearest whole number

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