Question

Two samples are taken with the following numbers of successes and sample sizes
r1r1 = 23 r2r2 = 31
n1n1 = 68 n2n2 = 55

Find a 90% confidence interval, round answers to the nearest thousandth.
? < p1−p2p1-p2 < ?

A study of working actors looked at age and gender. One sample of 60 male actors had a mean age of 25 and a standard deviation of 2. The other sample included 60 female actors with a mean age of 28 and a standard deviation of 5. Estimate with 89% confidence the difference between the average ages of working male (μ1μ1) and female (μ2μ2) actors. Round answers to the nearest hundredth.
? < μ1−μ2μ1-μ2 < ?

Answer 1

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