Elementary Statistics
Elementary Statistics
12th Edition
ISBN: 9780321836960
Author: Mario F. Triola
Publisher: PEARSON
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Chapter 12, Problem 8CRE

Job Priority Survey USA Today reported about an Adecco Staffing survey of 1000 randomly selected adults. Among those respondents, 20% chose health benefits as being most important to their job.

  1. a. What is the number of respondents who chose health benefits as being most important to their job?
  2. b. Construct a 95% interval estimate of the proportion of all adults who choose health benefits as being most important to their job.
  3. c. Based on the result from part (b), can we safely conclude that the true proportion is different from 1 /4? Why?
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Elementary Statistics

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