If x is a binomial random variable with n = 10 and π = 0.8, the standard deviation of x is ___.
A) 8.0
B) 1.26
C) 1.60
D) 64.0
E) 10

Name: If x is a binomial random variable with n = 10 and π = 0.8, the standard deviation of x is ___. A) 8.0 B) 1.26 C) 1.60 D) 64.0 E) 10
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Question

Quizplus · Accepted Answer

The formula for the standard deviation of a binomial distribution is:

σ = sqrt( n * π * (1 - π) )

Plugging in the values for n and π, we get:

σ = sqrt( 10 * 0.8 * (1 - 0.8) ) = 1.26 (rounded to two decimal places)

If X Is a Binomial Random Variable with N =