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The number X of days in the summer months that a construction crew cannot work because of the weather has the probability distribution: 7 0.08 6. 8 9. 10 11 12 13 14 f(x) 0.03 0.15 0.2 0.19 0.16 0.1 0.07 0.02 The mean and standard deviation of X are respectively: 9.79 and 1.8617 9.7 and 1.9 None of the other options 9.74 and 1.8954

The number X of days in the summer months that a construction crew cannot work because of the weather has the probability distribution: 7 0.08 6. 8 9. 10 11 12 13 14 f(x) 0.03 0.15 0.2 0.19 0.16 0.1 0.07 0.02 The mean and standard deviation of X are respectively: 9.79 and 1.8617 9.7 and 1.9 None of the other options 9.74 and 1.8954

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.3: Measures Of Spread
Problem 26PFA
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The number X of days in the summer months that a construction crew cannot work because of the weather has the probability distribution: 6. 7 8 9. 10 11 12 13 14 f(x) 0.03 0.08 0.15 0.2 0.19 0.16 0.1 0.07 0.02 The mean and standard deviation of X are respectively: 9.79 and 1.8617 9.7 and 1.9 None of the other options 9.74 and 1.8954 Question The temperature in degrees Celsius at a certain location is normally distributed with a mean of 68 degrees and a standard deviation of 4 degrees. The probability that the temperature in degrees Celsius at the same location is greater than 72 degrees is 0.1587 0.0228 None of other options 0.0062 Question * Let X and Y be two independent N(0,1) random variables and consider Z = 3+ X+ 2XY² , W 5 + X. Then Cov(Z, W) = Hint:Cov(X, X) = Var(X), Cov(X + c, Y) = Cov(X, Y) and Cov(X + Y, Z) = Cov(X,Z) + Cov(Y Z) O None of the other options
Transcribed Image Text:The number X of days in the summer months that a construction crew cannot work because of the weather has the probability distribution: 6. 7 8 9. 10 11 12 13 14 f(x) 0.03 0.08 0.15 0.2 0.19 0.16 0.1 0.07 0.02 The mean and standard deviation of X are respectively: 9.79 and 1.8617 9.7 and 1.9 None of the other options 9.74 and 1.8954 Question The temperature in degrees Celsius at a certain location is normally distributed with a mean of 68 degrees and a standard deviation of 4 degrees. The probability that the temperature in degrees Celsius at the same location is greater than 72 degrees is 0.1587 0.0228 None of other options 0.0062 Question * Let X and Y be two independent N(0,1) random variables and consider Z = 3+ X+ 2XY² , W 5 + X. Then Cov(Z, W) = Hint:Cov(X, X) = Var(X), Cov(X + c, Y) = Cov(X, Y) and Cov(X + Y, Z) = Cov(X,Z) + Cov(Y Z) O None of the other options
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