A political candidate testing the effectiveness of a new advertisement takes a simple random sample of 300 voters before the ad goes on air and another sample of 250 voters afterwards. 158 of the 300 voters in the "before" sample say they support his candidacy, and 140 voters in the “after" sample say they support him. If p,= proportion approving his candidacy in the after sample and p,= proportion approving his candidacy in the before sample, which of the following is the correct test statistic for H : p,– P3 = 0 ? 0.56 - 0.527 0.56-0.527 (a) z =- (b) z = - |0.56-0.44 0.527 ·0.473 (0.542)(0.458) 250* 300) 1 1 250 300 0.56 – 0.527 0.56– 0.527 (c) z = (d) z = |0.542 ·0.458 |0.56-0.44 |0.527-0.473 550 250 300 0.56 -0.527 (e) z=- |0.56, 0.527 250 300

A political candidate testing the effectiveness of a new advertisement takes a simple random sample of 300 voters before the ad goes on air and another sample of 250 voters afterwards. 158 of the 300 voters in the "before" sample say they support his candidacy, and 140 voters in the “after" sample say they support him. If p,= proportion approving his candidacy in the after sample and p,= proportion approving his candidacy in the before sample, which of the following is the correct test statistic for H : p,– P3 = 0 ? 0.56 - 0.527 0.56-0.527 (a) z =- (b) z = - |0.56-0.44 0.527 ·0.473 (0.542)(0.458) 250* 300) 1 1 250 300 0.56 – 0.527 0.56– 0.527 (c) z = (d) z = |0.542 ·0.458 |0.56-0.44 |0.527-0.473 550 250 300 0.56 -0.527 (e) z=- |0.56, 0.527 250 300

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Description: A political candidate testing the effectiveness of a new advertisement takes a simple random sample of 300 votersbefore the ad goes on air and another sample of 250 voters afterwards. 158 of the 300 voters in the "before" samplesay they support his

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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