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For X a binomial random variable with n=5 and p=1/4, answer the following A) what's P(X=2) B) what's P(2\leq X \leq ) C) what's the expected value of X D) what…
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For X a binomial random variable with n=5 and p=1/4, answer the following A) what's P(X=2) B) what's P(2\leq X \leq ) C) what's the expected value of X D) what…
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Feb 19, 2018
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For X a binomial random variable with n=5 and p=1/4, answer the following
A) what's P(X=2)
B) what's P(2
X
)
C) what's the expected value of X
D) what's the standard deviation of X
Mathematics
high-school
Sean Stayns
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Sean Stayns
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Recall that for
, i.e. a random variable
following a binomial distribution over
trials and with probability parameter
,
So you have
The expected value of
is simply
, while the standard deviation is
. In this case, they are
and
, respectively.
Abyshukla
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Feb 24, 2018
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Abyshukla
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