Internet users. A survey of users of the Internet in 1995, when Internet use was much less common than now, found that males outnumbered females by nearly 2 to 1. This was a surprise, because earlier surveys had put the ratio of men to women closer to 9 to 1. Later in the article we find 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 confidence level of 95 percent.

(a) What was the response rate for this survey? (The response rate is the percent of the planned sample that responded.)

(b) Use the quick method (page 42) to estimate the margin of error of this survey.

Is your result close to the 2.8% claimed?

(c) Do you think that the small margin of error is a good measure of the accuracy of the survey’s results? Explain your answer.

AppendixLO1