A survey asks, "If the husband in a family wants children, but the wife decides that she does not want any children, is it all right for the wife to refuse to have children?" Of 743 subjects, 569 said yes. Find a 99% confidence interval for the population proportion who would say yes using a TI 83 calculator.
A survey question posed to 743 people gets 569 positive answers. We are asked to find a 99% confidence interval of the true population proportion.
(1) In a TI-83/84 calculator:
Hit Stat -> Tests -> A (1-PropZInt)
x=569 (number of "successes")
n=743 (sample size)
C-Level: 99 (given in problem)
1-PropZInt (type of test)
(.7258,.80583) (interval you seek)
`hat(p)=.7658142665` (p-hat is the sample proportion...
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