A political candidate feels that she performed particularly well in the most recent debate against her opponent. Her campaign manager polled a random sample of 400 likely voters before the debate and a random sample of 500 likely voters after the debate. The 95% confidence interval for the true difference (post-debate minus pre-debate) in proportions of likely voters who would vote for this candidate was (-0.014, 0.064). What was the difference (pre- debate minus post-debate) in the sample proportions of likely voters who said they will vote for this candidate? 0.064 +(-0.014) 2 = 0.025 0.064 - (-0.014) = 0.039 2 O 0.064 + (-0.014) = 0.050 O 0.064 – (-0.014) = 0.078 %3D

A political candidate feels that she performed particularly well in the most recent debate against her opponent. Her campaign manager polled a random sample of 400 likely voters before the debate and a random sample of 500 likely voters after the debate. The 95% confidence interval for the true difference (post-debate minus pre-debate) in proportions of likely voters who would vote for this candidate was (-0.014, 0.064). What was the difference (pre- debate minus post-debate) in the sample proportions of likely voters who said they will vote for this candidate? 0.064 +(-0.014) 2 = 0.025 0.064 - (-0.014) = 0.039 2 O 0.064 + (-0.014) = 0.050 O 0.064 – (-0.014) = 0.078 %3D

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section: Chapter Questions

Problem 8CR

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