The Gallup organization conducted a poll with the following question: “In general, do you feel the...

The Gallup organization conducted a poll with the following question: “In general, do you feel the laws covering the sale of firearms should be made more strict, less strict or kept as they are now?” In February 1999, 60% of those surveyed said “more strict” and on April 26,1999, shortly after the Columbine high shootings, 66% said “more strict”. a) Assume both polls used samples of 560 people. Do a test to see whether the proportion that said “more strict “is statistically different in the two months at a significance level of 0.01. b) Repeat part a) with a sample of 1120 people. c) Comment on the p-value in both parts a and b and on the conclusion.

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orchestra answered 1 year ago

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