Homework Answers
p1cap = X1/N1 = 115/664 = 0.1732
p1cap = X2/N2 = 104/715 = 0.1455
pcap = (X1 + X2)/(N1 + N2) = (115+104)/(664+715) = 0.1588
Below are the null and alternative Hypothesis,
Null Hypothesis, H0: p1 = p2
Alternate Hypothesis, Ha: p1 ≠ p2
Test statistic
z = (p1cap - p2cap)/sqrt(pcap * (1-pcap) * (1/N1 + 1/N2))
z = (0.1732-0.1455)/sqrt(0.1588*(1-0.1588)*(1/664 + 1/715))
z = 1.41
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