Homework Answers
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p = x1+x2/n1+n2 = 60+40/100+100 = .50
p1 = x1/n1 = 60/100 = .60
p2 = x2/n2 = 40/100 = .40
z =((0.6-0.4)-(0))/SQRT(0.5*0.5*(1/100+1/100)) = 2.828
The p-value is therefore, P(|z|>2.828) = 2*(1-.002339) = .004678
Answer is 3. 0.0046
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