SOLUTION: 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 overa

Question 860962: 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 x = 37.5 ml/kg (milliliters plasma per kilogram body weight). Assume that σ = 7.80 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? (Round your answers to two decimal places.)

a.lower limit
b.upper limit
c.margin of error

(b) What conditions are necessary for your calculations? (Select all that apply.)

a. n is large
b. σ is known
c. the distribution of weights is normal
d. σ is unknown
e. the distribution of weights is uniform
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!

 

Hi,

ME = = 3   (2 decimal points

CI: μ-ME < u <  μ + ME

CI: 37.5-ME < u <  37.5 + ME

CI: 34.5ml/kg < u < 40.5ml/kg

b. σ is known 

c. the distribution of weights is normal 

CI	z -value

80%     z= 1.2816

90%	z =1.645

92%	z = 1.751

95%	z = 1.96

98%	z = 2.326

99%	z = 2.576

 

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