The random variable x represents the number of boys in a family of three children. Assuming that boys and girls are equally likely, find the mean and standard deviation for the random variable x. x P(x) 0 0.125 1 0.375 2 0.375 3 0.125
The random variable x represents the number of boys in a family of three children. Assuming that boys and girls are equally likely, find the mean and standard deviation for the random variable x. x P(x) 0 0.125 1 0.375 2 0.375 3 0.125
Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.3: Special Probability Density Functions
Problem 40E: Pygmy Height The average height of a member of a certain tribe of pygmies is 3.2ft, with a standard...
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The random variable x represents the number of boys in a family of three children. Assuming that boys and girls are equally likely, find the mean and standard deviation for the random variable x.
x
|
P(x)
|
|
---|---|---|
0
|
0.125
|
|
1
|
0.375
|
|
2
|
0.375
|
|
3
|
0.125
|
|
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Part 1
mean: 1.50; standard deviation: 0.76
mean: 2.25; standard deviation: 0.76
mean: 2.25; standard deviation: 0.87
mean: 1.50; standard deviation: 0.87
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