Inferential Statistics and Distributions 13–21
8250FC~1.DOC TI-83 international English Bob Fedorisko Revised: 10/26/05 1:39 PM Printed: 10/27/05 2:57
PM Page 21 of 36
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
Np
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:
2.PropZInt
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