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I am attempting to find the P-value of a hypothesis test, which compares the success rate of two procedures. A test with 0.05 level of significance is conducted to test the success rate of two procedures.

Procedure A Sample Size: 200, Number of Success: 125

Procedure B Sample Size: 100, Number of Success: 55

My Attempt

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The cooprrect p-val in the ans key is 0.2113. Appreciate some guidiance on where Ive gone wrong

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    $\begingroup$ I wonder if the answer key has a typo (if I just did it right, I think it should be nearer to 0.213). Another possibility might be if a continuity correction was used. $\endgroup$ – Glen_b Apr 22 '14 at 10:54
  • $\begingroup$ Thank you for your continual help Glen. May I seek your advice if my steps are on the right path? $\endgroup$ – user1275515 Apr 22 '14 at 11:27
  • $\begingroup$ They look okay to me. $\endgroup$ – Glen_b Apr 22 '14 at 11:36

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