SOLUTION: An independent poll of college students showed that 50% of college students watch the Winter Olympics. For a sample of 120 students selected at random, what is the mean and varian
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Question 407230: An independent poll of college students showed that 50% of college students watch the Winter Olympics. For a sample of 120 students selected at random, what is the mean and variance of the number of students who watch this evident? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! An independent poll of college students showed that 50% of college students watch the Winter Olympics. For a sample of 120 students selected at random, what is the mean and variance of the number of students who watch this evident?
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Binomial Problem when n = 120 and p = 0.5
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mean = np = 60
variance = npq = 60*0.5 = 30
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Cheers,
Stan H.
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