HOW TO FIND THE CONFIDENCE INTERVAL FOR ONE SAMPLE PROPORTION WITH TI83 CALCULATOR

Steps	Key Sequence	Screens
1. Set up Stats Tests	STAT
	twice
	ALPHA, then MATH (for 1–PropZInt...)
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; is 0.5069 and n is 4040.