13th Edition

ISBN: 9780135900826

Author: Triola

Publisher: PEARSON

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A new framework of data analysis where the new statistical methods are used for interpreting the results and analyzing the data is known as estimation in statistics.

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Textbook Question

Chapter 5.2, Problem 39BSC

Perception and Reality In a presidential election, 611 randomly selected voters were surveyed, and 308 of them said that they voted for the winning candidate (based on data from ICR Survey Research Group). The actual percentage of votes for the winning candidate was 43%. Assume that 43% of voters actually did vote for the winning candidate, and assume that 611 voters are randomly selected.

a. Use the range rule of thumb to identify the limits separating values that are significantly low and those that are significantly high. Based on the results, is the 308 voters who said that they voted for the winner significantly high?

b. Find the probability of exactly 308 voters who actually voted for the winner.

c. Find the probability of 308 or more voters who actually voted for the winner.

d. Which probability is relevant for determining whether the value of 308 voters is significantly high: the probability from part (b) or part (c)? Based on the relevant probability, is the result of 308 voters who said that they voted for the winner significantly high?

e. What is an important observation about the survey results?

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Chapter 5.2, Problem 38BSC

Chapter 5.2, Problem 40BSC

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Chapter 5 Solutions

ELEMENTARY STATS. 18 WEEK ACCESS CODE

Ch. 5.1 - Random Variable The accompanying table lists...Ch. 5.1 - Discrete or Continuous? Is the random variable...Ch. 5.1 - Probability Distribution For the accompanying...Ch. 5.1 - Significant For 100 births, P(exactly 56 girls) =...Ch. 5.1 - Identifying Discrete and Continuous Random...Ch. 5.1 - Identifying Discrete and Continuous Random...Ch. 5.1 - Identifying Probability Distributions. In...Ch. 5.1 - Identifying Probability Distributions. In...Ch. 5.1 - Identifying Probability Distributions. In...Ch. 5.1 - Identifying Probability Distributions. In...

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