Steps | Key Sequence | Screens |
1. Set up Stats Tests | STAT | ![]() |
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ALPHA, then MATH (for 1–PropZInt...) | ![]() |
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2. Input number of successes, x | enter value for x, then ENTER | ![]() |
3. Input number of observations in SAMPLE, n | enter value for n, then ENTER | ![]() |
4. Input confidence level | enter confidence level (AS DECIMAL), then ENTER | ![]() |
5. Calculate confidence interval | ENTER | ![]() |
In this case, the 95% CI is from 0.49151 to 0.52235; ![]() |