Elementary Statistics: A Step By Step Approach

10th Edition

ISBN: 9781259755330

Author: Allan G. Bluman

Publisher: McGraw-Hill Education

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Types of Bias

Statistics is the study of data collection, organization, analysis, interpretation, and presentation. Statistical bias is a characteristic of a statistical technique or its findings in which the expected value deviates from the actual root quantitative p…

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Textbook Question

Chapter 14.1, Problem 18E

Electoral Votes Divide the 50 states into five subgroups by geographic location, using a map of the United States. Each subgroup should include 10 states. The subgroups should be northeast, southeast, central, northwest, and southwest. Select two states from each subgroup, and find the mean number of electoral votes for the sample. Compare these means with the population mean.

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 14.1, Problem 17E

Chapter 14.1, Problem 19E

Chapter 14 Solutions

Elementary Statistics: A Step By Step Approach

Ch. 14.1 - The White or Wheat Bread Debate Read the following...Ch. 14.1 - Name the four basic sampling techniques.Ch. 14.1 - Why are samples used in statistics?Ch. 14.1 - What is the basic requirement for a sample?Ch. 14.1 - Why should random numbers be used when you are...Ch. 14.1 - List three incorrect methods that are often used...Ch. 14.1 - What is the principle behind random numbers?Ch. 14.1 - List the advantages and disadvantages of random...Ch. 14.1 - List the advantages and disadvantages of...Ch. 14.1 - List the advantages and disadvantages of...

Ch. 14.1 - List the advantages and disadvantages of cluster...Ch. 14.1 - Teacher Data Using the table of random numbers,...Ch. 14.1 - Prob. 12E Ch. 14.1 - Teacher Data Select a cluster sample of 10 states,...Ch. 14.1 - Record High Temperatures Which method of sampling...Ch. 14.1 - Prob. 16E Ch. 14.1 - Electoral Votes Select a systematic sample of 10...Ch. 14.1 - Electoral Votes Divide the 50 states into five...Ch. 14.1 - Prob. 19E Ch. 14.1 - Define sampling or selection bias.Ch. 14.1 - Prob. 22E Ch. 14.1 - Define nonresponsive bias.Ch. 14.1 - Prob. 24E Ch. 14.1 - Define response or interview bias.Ch. 14.1 - Prob. 26E Ch. 14.1 - Define volunteer bias.Ch. 14.1 - Give an example of how volunteer bias might occur.Ch. 14.2 - Prob. 1AC Ch. 14.2 - Prob. 1E Ch. 14.2 - Prob. 2E Ch. 14.2 - Prob. 3E Ch. 14.2 - Prob. 4E Ch. 14.2 - Prob. 5E Ch. 14.2 - Prob. 6E Ch. 14.2 - Prob. 7E Ch. 14.2 - Prob. 8E Ch. 14.2 - Prob. 9E Ch. 14.2 - Exercises 1 through 9 include questions that...Ch. 14.2 - Prob. 11E Ch. 14.2 - Exercises 1 through 9 include questions that...Ch. 14.2 - Prob. 13E Ch. 14.2 - Prob. 14E Ch. 14.2 - Prob. 15E Ch. 14.2 - Exercises 1 through 9 include questions that...Ch. 14.2 - Prob. 17E Ch. 14.2 - Prob. 18E Ch. 14.2 - Prob. 19E Ch. 14.3 - Simulations Answer the following questions: 1....Ch. 14.3 - Prob. 1E Ch. 14.3 - Prob. 2E Ch. 14.3 - Who is responsible for the development of modern...Ch. 14.3 - Prob. 4E Ch. 14.3 - Prob. 5E Ch. 14.3 - Prob. 6E Ch. 14.3 - Prob. 7E Ch. 14.3 - Prob. 8E Ch. 14 - Hurricanes Select a random sample of eight storms...Ch. 14 - Prob. 14.1.2RE Ch. 14 - Hurricanes Select a cluster of 10 storms. Compute...Ch. 14 - Prob. 14.1.4RE Ch. 14 - Prob. 14.1.5RE Ch. 14 - Prob. 14.1.6RE Ch. 14 - Prob. 14.1.8RE Ch. 14 - Prob. 14.2.9RE Ch. 14 - Prob. 14.2.10RE Ch. 14 - Prob. 14.2.11RE Ch. 14 - Prob. 14.2.12RE Ch. 14 - Prob. 1DA Ch. 14 - Prob. 2DA Ch. 14 - Select a cluster sample of 20 individuals, and...Ch. 14 - Prob. 4DA Ch. 14 - Prob. 5DA Ch. 14 - Determine whether each statement is true or false....Ch. 14 - Prob. 2CQ Ch. 14 - Prob. 3CQ Ch. 14 - Prob. 4CQ Ch. 14 - Prob. 5CQ Ch. 14 - Prob. 6CQ Ch. 14 - Interviewing selected people at a local...Ch. 14 - Prob. 8CQ Ch. 14 - Prob. 9CQ Ch. 14 - Prob. 10CQ Ch. 14 - Blood Pressure Select a random sample of 12...Ch. 14 - Prob. 12CQ Ch. 14 - Blood Pressure Divide the individuals into...Ch. 14 - Prob. 14CQ Ch. 14 - Prob. 25CQ Ch. 14 - Prob. 26CQ Ch. 14 - Prob. 27CQ Ch. 14 - Prob. 28CQ Ch. 14 - For Exercises 2530, explain why the survey...Ch. 14 - Prob. 30CQ Ch. 14 - Prob. 1DP

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Solution Summary: The author explains that the sample mean of number of electoral votes is 7.7, and that there is a large difference between sample and population mean.

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