Internet users then A survey of Internet users in 1995

Chapter 5, Problem 5.57

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Internet users then A survey of Internet users in 1995 found that males outnumbered females by nearly 2 to 1. Th is was a surprise, because earlier surveys had put the ratio of men to women closer to 9 to 1. Later in the article we fi nd this information: Detailed surveys were sent to more than 13,000 organizations on the Internet; 1,468 usable responses were received. According to Mr. Quarterman, the margin of error is 2.8 percent, with a confi dence level of 95 percent.17 (a) What was the response rate for this survey? (Th e response rate is the percent of the planned sample that responded.) (b) Use the quick method (page 229) to estimate the margin of error of this survey. Is your result close to the 2.8% claimed? (c) Is the small margin of error a good measure of the accuracy of the surveys results? Explain your answer.