Use the two-proportions z-interval procedure to obtain the required confidence interval for the difference between two...

Use the two-proportions z-interval procedure to obtain the required confidence interval for the difference between two population proportions. Assume that independent simple random samples have been selected from the two populations.

A survey of students at one college found that 57 of 96 randomly selected freshmen and 85 of 118 randomly selected sophomores lived off campus. Find a 98% confidence interval for the difference between the proportions of freshmen and sophomores at this college who live off campus.

		-0.278 to 0.025
		0.468 to 0.721
		-0.254 to 0.721
		0.444 to 0.744

Solutions

Expert Solution

Therefore, based on the data provided, the 98% confidence interval for the difference between the population proportions p1−p2 is −0.278<p<0.025

OPTION A is correct

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orchestra answered 1 year ago

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