13-20 Inferential Statistics and Distributions
8313INFE.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:47 PM Printed: 02/19/01 1:38 PM
Page 20 of 36
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:
)
1-PropZInt
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