We would like to estimate the true proportion of all Winnipeggers who read the Winnipeg Free...
We would like to estimate the true proportion of all Winnipeggers who read the
Winnipeg Free Press. What sample size is required to estimate this proportion to
within 0.03 with 88% con dence?
(A) 612
(B) 632
(C) 672
(D) 652
(E) 692
Homework Answers
Here we have to find the sample size for margin of error E= 0.03 and confidence level c = 0.88
For c = 0.88 table value Zc = 1.555
so, sample size is given by,
Answer: c) 672
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