Bundle: Understandable Statistics: Concepts And Methods, 12th + Webassign, Single-term Printed Access Card

12th Edition

ISBN: 9781337605199

Author: Charles Henry Brase, Corrinne Pellillo Brase

Publisher: Brooks Cole

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Textbook Question

Chapter 1.3, Problem 10P

Surveys: Manipulation The New York Times did a special report on polling that was carried in papers across the nation. The article pointed out how readily the results of a survey can be manipulated. Some features that can influence the results of a poll include the following: the number of possible responses, the phrasing of the questions, the sampling techniques used (voluntary response or sample designed to be representative), the fact that words may mean different things to different people, the questions that precede the question of interest, and finally, the fact that respondents can offer opinions on issues they know nothing about.

(a) Consider the expression “over the last few years.” Do you think that this expression means the same time span to everyone? What would be a more precise phrase?
(b) Consider this question: “Do you think fines for running stop signs should be doubled?” Do you think the response would be different if the question “Have you ever run a stop sign?” preceded the question about fines?
(c) Consider this question: “Do you watch too much television?” What do you think the responses would be if the only responses possible were yes or no? What do you think the responses would be if the possible responses were “rarely,” “sometimes,” or “frequently”?

Definition Definition Measure of central tendency that is the average of a given data set. The mean value is evaluated as the quotient of the sum of all observations by the sample size. The mean, in contrast to a median, is affected by extreme values. Very large or very small values can distract the mean from the center of the data. Arithmetic mean: The most common type of mean is the arithmetic mean. It is evaluated using the formula: μ = 1 N ∑ i = 1 N x i Other types of means are the geometric mean, logarithmic mean, and harmonic mean. Geometric mean: The nth root of the product of n observations from a data set is defined as the geometric mean of the set: G = x 1 x 2 ... x n n Logarithmic mean: The difference of the natural logarithms of the two numbers, divided by the difference between the numbers is the logarithmic mean of the two numbers. The logarithmic mean is used particularly in heat transfer and mass transfer. ln x 2 − ln x 1 x 2 − x 1 Harmonic mean: The inverse of the arithmetic mean of the inverses of all the numbers in a data set is the harmonic mean of the data. 1 1 x 1 + 1 x 2 + ...

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Chapter 1.3, Problem 9P

Chapter 1.3, Problem 11P

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Chapter 1 Solutions

Bundle: Understandable Statistics: Concepts And Methods, 12th + Webassign, Single-term Printed Access Card

Ch. 1.1 - Statistical Literacy In a statistical study what...Ch. 1.1 - Statistical Literacy Are data at the nominal level...Ch. 1.1 - Statistical Literacy What is the difference...Ch. 1.1 - Statistical Literacy For a set population, does a...Ch. 1.1 - Critical Thinking Numbers are often assigned to...Ch. 1.1 - Interpretation Lucy conducted a survey asking some...Ch. 1.1 - Marketing: Fast Food A national survey asked 1261...Ch. 1.1 - Advertising: Auto Mileage What is the average...Ch. 1.1 - Ecology: Wetlands Government agencies carefully...Ch. 1.1 - Archaeology: Ireland The archaeological site of...

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