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A random sample of 250 men yielded 175 who said they'd ridden a motorcycle at some time in their lives, while a similar sample of 215 women yielded only 43 that had done so. Find a 99% confidence interval for the difference between the proportions of men and women who have ridden motorcycles.


.4688 ± .085

.5 ± .112

.5 ± .103

.5 ± .085

.5 ± .078

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