Introduction To Statistics And Data Analysis
6th Edition
ISBN: 9781337793612
Author: PECK, Roxy.
Publisher: Cengage Learning,
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Chapter 8.3, Problem 25E
The article “Younger Adults More Likely than Their Elders to Prefer Reading the News” (October 6, 2016, pewresearch.org/fact-tank/2016/10/06/younger-adults-more-likely-than-their-elders-to-prefer-reading-news/, retrieved March 28, 2018) estimated that only 3% of those age 65 and older who prefer to watch the news, rather than to read or listen to news, watch the news online. This estimate was based on a large sample of adult Americans conducted by the Pew Research Center. Consider the population consisting of all adult Americans age 65 and older who prefer to watch the news and suppose that for this population the actual proportion who prefer to watch online is 0.03. (Hint: See Example 8.9.)
- a. A random sample of n = 100 people will be selected from this population and
- b. Is it reasonable to assume that the sampling distribution of
- c. Suppose that the
sample size is n = 400 rather than n = 100, as in Part (b). Does the change in sample size change the mean and standard deviation of the sampling distribution of - d. Is it reasonable to assume that the sampling distribution of
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Chapter 8 Solutions
Introduction To Statistics And Data Analysis
Ch. 8.1 - Explain the difference between a population...Ch. 8.1 - What is the difference between x and ? Between s...Ch. 8.1 - For each of the following statements, identify the...Ch. 8.1 - Consider a population consisting of the following...Ch. 8.1 - Select 10 additional random samples of size 5 from...Ch. 8.1 - Consider the following population: {1, 2, 3, 4}....Ch. 8.1 - Consider the following population: {2, 3, 3, 4,...Ch. 8.2 - A random sample is selected from a population with...Ch. 8.2 - For which of the sample sizes given in the...Ch. 8.2 - Explain the difference between and x and between ...
Ch. 8.2 - Suppose that a random sample of size 64 is to be...Ch. 8.2 - The time that a randomly selected individual waits...Ch. 8.2 - Let x denote the time (in minutes) that it takes a...Ch. 8.2 - In the library on a university campus, there is a...Ch. 8.2 - Suppose that the mean value of interpupillary...Ch. 8.2 - Suppose that a sample of size 100 is to be drawn...Ch. 8.2 - A manufacturing process is designed to produce...Ch. 8.2 - College students with checking accounts typically...Ch. 8.2 - An airplane with room for 100 passengers has a...Ch. 8.2 - The thickness (in millimeters) of the coating...Ch. 8.3 - A random sample is to be selected from a...Ch. 8.3 - a. For which of the sample sizes given in the...Ch. 8.3 - The article Younger Adults More Likely than Their...Ch. 8.3 - The article referenced in the previous exercise...Ch. 8.3 - A certain chromosome defect occurs in only 1 in...Ch. 8.3 - The U.S. Census Bureau reported that in 2015, the...Ch. 8.3 - The article Fewer Americans Are Reading, But Dont...Ch. 8.3 - Suppose that a candidate for public office is...Ch. 8.3 - A manufacturer of computer printers purchases...Ch. 8 - The nicotine content in a single cigarette of a...Ch. 8 - Let x1, x2, , x100 denote the actual weights (in...Ch. 8 - Suppose that 20% of the subscribers of a cable...Ch. 8 - Water permeability of concrete can be measured by...Ch. 8 - Suppose that 40% of all U.S. employees contribute...Ch. 8 - The amount of money spent by a customer at a...
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