Texas Instruments TI-84 PLUS Guidebook - Page 239
PropZInt, computes a confidence interval for
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1-PropZInt 1-PropZInt (one-proportion z confidence interval; item A) computes a confidence interval for an unknown proportion of successes. It takes as input the count of successes in the sample x and the count of observations in the sample n. The computed confidence interval depends on the userspecified confidence level. Input: Calculated results: 2-PropZInt 2-PropZInt (two-proportion z confidence interval; item B) computes a confidence interval for the difference between the proportion of successes in two populations (p1Np2). It takes as input the count of successes in each sample (x1 and x2) and the count of observations in each sample (n1 and n2). The computed confidence interval depends on the user-specified confidence level. Input: Calculated results: Chapter 13: Inferential Statistics and Distributions 232