Texas Instruments TI-83 PLUS - Manual (Page 414)

TI-83 Plus Inferential Statistics and Distributions 411
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 (p
1
N p
2
). It takes as input the count of
successes in each sample ( x
1
and x
2
) and the count of observations in
each sample ( n
1
and n
2
). The computed confidence interval depends on
the user-specified confidence level.
Input:
,
Calculated results: