SOLUTION: Two samples are taken with the following numbers of successes and sample sizes r1=26 r2=28 n1=92 n2=63 Find a 98% confidence interval, round answers to the nearest thousandth
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Question 1107255: Two samples are taken with the following numbers of successes and sample sizes r1=26 r2=28 n1=92 n2=63 Find a 98% confidence interval, round answers to the nearest thousandth Answer by Boreal(15235) (Show Source):
You can put this solution on YOUR website! proportion 1 is 26/92=0.2826
proportion 2 is 28/63=0.4444
Their difference is -0.1618
the CI is 0.1618+/- z(0.99)sqrt (p1(1-p1))/n1+(p2(1-p2))/n2))
=-0.1618 +/- 2.326*sqrt (0.006122)
=-0.1618+/-0.1820 or (-0.344, 0.020)
