1 Let X and Y be two random variables with the joint PDF fx y (x,y)=D 1 y where 0sxs5 and 0sys4 90 (a) The marginal distribution of X is (select the correct choice and fill in the box): O A. fx(x) =| for 0sxs5. O B. fx(x) = for 0sys4. a C a C a C (Insert a function like X+- or y + y as necessary.) or (b) The marginal distribution of Y is (select the correct choice and fill in the box):

1 Let X and Y be two random variables with the joint PDF fx y (x,y)=D 1 y where 0sxs5 and 0sys4 90 (a) The marginal distribution of X is (select the correct choice and fill in the box): O A. fx(x) =| for 0sxs5. O B. fx(x) = for 0sys4. a C a C a C (Insert a function like X+- or y + y as necessary.) or (b) The marginal distribution of Y is (select the correct choice and fill in the box):

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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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 46 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 ? = 7.40 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.) lower limit__ upper limit__ margin of error__ (b)What conditions are necessary for your calculations? (Select all that apply.) A-the distribution of volumes is normal B-the distribution of volumes is uniform C-? is unknown D-? is known E-n is large (c)Interpret your results in the context of this problem. A-The probability that this interval…
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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 46 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 ? = 7.80 ml/kg for the distribution of blood plasma. (d) Find the sample size necessary for a 99% confidence level with maximal margin of error E = 2.90 for the mean plasma volume in male firefighters. (Round up to the nearest whole number.) ________ male firefighters
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