Exam 26: Exploring and Collecting Data

In their October 2003 issue, Consumer Reports evaluated the price and Performance of 23 models of cordless phones. Computer output gives the summary Statistics for the prices ($) shown in the table. The IQR for these data is Min Q1 Median Q3 Max Mean SD 15 30 50 110 200 71.75 52.08

An advocacy group is investigating whether gender has an effect on job category In large investment firms. She surveyed a sample of firms with the results shown below. Which of the following statements is true about gender and job category?

A researcher is conducting a study on Internet use. He decides to first categorize The population by education level (high school, college graduate, advanced degree, etc.) And then survey a select number from each category. This sampling strategy is called