SOLUTION: suppose that 65% of the students at a particular university have a twitter account. If 100 students are selected at random from this university, what are the mean and standard devi

Question 823478: suppose that 65% of the students at a particular university have a twitter account. If 100 students are selected at random from this university, what are the mean and standard deviation of the random variable x = number of selceted students who have a twitter account
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
suppose that 65% of the students at a particular university have a twitter account. If 100 students are selected at random from this university, what are the mean and standard deviation of the random variable x = number of selceted students who have a twitter account
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Binomial Statistics:
u = np = 100*0.65 = 65
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std = sqrt(npq) = sqrt(65*0.35) = 4.77
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Cheers,
Stan H.
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