choose between yes no Yes SolutionFormulating the hypotheses
choose between yes, no
| -Yes |
Solution
Formulating the hypotheses
Ho: p1^ - p2^ = 0
Ha: p1^ - p2^ =/ 0
Here, we see that pdo = 0 , the hypothesized population proportion difference.
Getting p1^ and p2^,
p1^ = x1/n1 = 0.647058824
p2 = x2/n2 = 0.644444444
Also, the standard error of the difference is
sd = sqrt[ p1 (1 - p1) / n1 + p2 (1 - p2) / n2] = 0.096243581
Thus,
z = [p1 - p2 - pdo]/sd = 0.027164192 [ANSWER]
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As significance level = 0.05 , then the critical z is
zcrit = 1.644853627
Also, the p value is
P = 0.489164388 [ANSWER]
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Thus comparing p > 0.05, then we FAIL TO REJECT THE NULL HYPOTHESIS. [NO, NOT SIGNIFICANT]
