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    Z test for two proportions

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    Medical tests were conducted to learn about drug-resistant tuberculosis. Of 142 cases tested in NJ, 9 were found to be drug-resistant. Of 268 cases tested in Tx, 5 were found to be drug-resistant. Do these data suggest a statistically significant difference between the proportions of drug-resistant cases in the 2 states? Use a 0.02 level of significance. What is the p-value, and what is your conclusion.

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    Solution Summary

    Step by step method for computing test statistic for Z-test for comparing two proportions .