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April 28, 2015

Homework Help: Statistics and Probability

Posted by Adam on Wednesday, March 9, 2011 at 3:51pm.

Suppose that the proportion of students who used the Internet as their major resource for school in the past was 66%. A sample of 1000 students was taken and the number of students who used the Internet for their school during the past year was recorded. Let ��̂ be the proportion of students surveyed who used the Internet in the past year.
(A) What is the approximate distribution of ��̂ ?
(B) What is the probability that the sample proportion ��̂ exceeds 68%?
(C) What is the probability that the sample proportion lies between 64% and 68%?

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