Question 108365: Suppose that twenty-eight percent of women consider themselves hockey fans. You randomly select 9 of the population and ask each if they are hockey fans. Construct a binomial distribution and use the distribution to find the mean, variance, and standard deviation of the binomial distribution.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! Suppose that twenty-eight percent of women consider themselves hockey fans. You randomly select 9 of the population and ask each if they are hockey fans. Construct a binomial distribution and use the distribution to find the mean, variance, and standard deviation of the binomial distribution.
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Hopefully you have a calculator and can figure out the distribution
using binom(n,p,x) for n=9, p=0.28, x = 1, then 2, then 3,...,then 9
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mean = np = 9*0.28
variance = npq = 9*0.28*0.72
standard = sqrt(npq) = sqrt(variance)
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Cheers,
Stan H.
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