Texas Instruments TI-83 PLUS - Manual (Page 413)

TI-83 Plus Inferential Statistics and Distributions 410
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 user-specified confidence level.
Input:
,
Calculated results: