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Why the Discrepancy A Gallup poll was taken two years

Essentials of Statistics | 5th Edition | ISBN: 9780321924599 | Authors: Mario F. Triola ISBN: 9780321924599 237

Solution for problem 6 Chapter 1

Essentials of Statistics | 5th Edition

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Essentials of Statistics | 5th Edition | ISBN: 9780321924599 | Authors: Mario F. Triola

Essentials of Statistics | 5th Edition

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Problem 6

Why the Discrepancy? A Gallup poll was taken two years before a presidential elec-tion, and it showed that Hillary Clinton was preferred by about 50% more voters thanBarack Obama. The subjects in the Gallup poll were randomly selected and surveyed bytelephone. An America OnLine (AOL) poll was conducted at the same time as the Galluppoll, and it showed that Barack Obama was preferred by about twice as many respon-dents as Hillary Clinton. In the AOL poll, Internet users responded to voting choices that were posted on the AOL site. How can the large discrepancy between the two polls beexplained? Which poll is more likely to reflect the true opinions of American voters at thetime of the poll?

Step-by-Step Solution:
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# data analysis with two examples #shipment cost data data=read.csv("C:/Users/Muthudivya NK/OneDrive - Clemson University/1. Fall 2017/STAT 8030/R Codes and Output/shipment-cost.csv") #we want to predict the cost of a new shiptment on weight, cargo.type and distance #recommendation: check for missing values, fill in the missing values if applicable m1=lm(cost~weight+cargo.type+distance,...

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Chapter 1, Problem 6 is Solved
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Textbook: Essentials of Statistics
Edition: 5
Author: Mario F. Triola
ISBN: 9780321924599

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Why the Discrepancy A Gallup poll was taken two years

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