SOLUTION: According to data collected, 0.6% of Facebook users are under 13(the site is restricted to users 13 and older). In a simple random sample of 500 children under the age of 13, find
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Question 999892: According to data collected, 0.6% of Facebook users are under 13(the site is restricted to users 13 and older). In a simple random sample of 500 children under the age of 13, find the mean and standard deviation for number of Facebook users. Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! np is the mean, and it is 500*.006=3
standard deviation is square root of variance, which is np(1-p)
(1-p)=0.004
np(1-p)=2.982
square root of that is 1.73 to two decimal places.
