Answer:
Given that,
Determine the probability P(1 or fewer) for a binomial experiment with n=12 trials and the success probability p=0.3.
Then find the mean, variance, and standard deviation:
We know that,
The binomial distribution formula,
Here,
n=12 p=0.3
(1).
P (1 or fewer):
P (1 or fewer) means P(X < 1).
P(X < 1)=P(X=0)
Then,
=0.013842872
=0.0138 (Approximately)
Therefore, P( 1 or fewer)=0.0138.
(2).
The mean ():
We know that the mean is
=12 0.3
=3.6
Therefore, the mean ()=3.6.
(3).
The variance ():
We know that the variance is,
=12 0.3 (1-0.3)
=12 0.3 0.7
=2.52
Therefore, the variance is ()=2.52.
The standard deviation ():
We know that, the standard deviation is,
=1.58745079
=1.588 (Approximately)
Therefore, the standard deviation is ()=1.588.
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