SOLUTION: A recent survey found that 56% of mobile phone users, between the ages of 18 to 34, had a smartphone. Suppose a random sample of 100 mobile phone users were selected. What is the p
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Question 912851: A recent survey found that 56% of mobile phone users, between the ages of 18 to 34, had a smartphone. Suppose a random sample of 100 mobile phone users were selected. What is the probability that less than 50 of them have a smartphone Answer by ewatrrr(24785) (Show Source):
You can put this solution on YOUR website! p = .56
Sample 100, P(xbar < .50) = (.50-.56)/sqrt(.56*.44/1000)
P(z < -3.8224 ) = .0001 0r .01%
