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x 0 1 P ( x ) 0.3 0.7 The standard deviation of X is closest...

x 0 1
P ( x ) 0.3 0.7

The standard deviation of X is closest to

Math   Statistics-And-Probability   
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Homework Answers

Answer #1

Solution:

x P(x) x * P(x) x2 * P(x)
0 0.3 0 0
1 0.7 0.7 0.7
Sum 1 0.7 0.7

Mean = X * P(X)

= 0.7

Standard deviation =

=X 2 * P(X) - 2

=  0.7 - (0.7)2 = 0.21

Standard deviation = = 0.4583

The standard deviation of X is closest to 0.4583

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