Concept explainers
To figure out: the percentage of U.S. adults with one or more tattoos and explain the reason that it would not be acceptable to use such statistics to create a 95 percent confidence interval for the proportion of all U.S. adults with tattoos.
Answer to Problem 50E
Not fulfilled the random condition
Explanation of Solution
There are three conditions for a confidence interval of 95 per cent for Proportion: Random, Independent and Normal.
The random condition was not fulfilled, since the sample was taken by a group of voluntary responses which is not indicative for the whole population.
Hence, the correct option is (b)
Chapter 12 Solutions
The Practice of Statistics for AP - 4th Edition
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Basic Business Statistics, Student Value Edition
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Introductory Statistics (10th Edition)
Elementary Statistics: Picturing the World (7th Edition)
Fundamentals of Statistics (5th Edition)
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