Find a 90 Percent Confidence Interval for the Difference Between

question 106

Multiple Choice

Find a 90 percent confidence interval for the difference between the proportions of Group l and Group 2.Let p₁ represent the population proportion of the people in group 1 who are in favor of new packaging and Let p₂ represent the population proportion of the people in group 2 who are in favor of new packaging,where ₁ = .21, ₂ = .13,n₁= 300,n₂ = 400.

• A)(.0472 .1128)
• B)(.0510 .1090)
• C)(.0232 .1368)
• D)(.0324 .1276)

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