7 310 7-1 Estimating a Population Proportion 7-2 Estimating a Population Mean 7-3 Estimating a Population Standard Deviation or Variance 7-4 Bootstrapping: Using Technology for Estimates Surveys: The Window to Evolving Technologies ESTIMATING PARAMETERS AND DETERMINING SAMPLE SIZES Importance of Surveys In our relatively new data-driven world, it is essential that we have the ability to analyze and understand the polls and surveys that play a critical role in guiding just about every facet of our lives. This chapter presents the tools for developing that ability. Listed below are some recent surveys that focus on evolving technologies, and it doesn’t take much imagination to recognize that each of these surveys reveals results with serious implications. • In a Pearson survey, 59% of Gen-Z respondents (ages 14–23) identified YouTube as a preferred learning tool (see Chapter 1 Problem). Good to know for college professors and textbook authors! • In a National Center for Health Statistics survey of 16,113 subjects, 53.9% of them lived in homes with no landline phones. Good to know for those providing landline phone service and emergency responders. CHAPTER PROBLEM
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