TI-89 / TI-92 Plus / Voyage™ 200 PLT Statistics with List Editor App ‰ Ints (Intervals) Menu 186
1-PropZInt
Description
2 ‰ (
Ints) Æ 5:1.PropZInt for the TI-89
‰ (Ints) Æ 5:1.PropZInt for the TI-92 Plus / Voyage™ 200 PLT
1.PropZInt (one-proportion z confidence interval) 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 probability.
Inputs
Successes, x Number of positive sample results from trial.
n Number of samples taken in trial.
C Level Confidence level probability with default = .99
Outputs
Outputs Stored to Description
C Int lower,
upper
Confidence interval containing confidence level probability of
distribution.
p_hat p_hat The calculated proportion of successes.
ME me Margin of error.
n n Number of samples in data sequence.
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