AMS 5 Chapter Notes - Chapter 19-20: Simple Random Sample, Yuppie, Voting Age

• School: UCSC
• Department: Applied Math and Statistics
• Course: AMS 5
• Professor: Yonatan Katznelson

Document Summary

A survey organization is planning to do an opinion survey of 2,500 people of voting age in the u. s. True or false, and explain: the organization will choose people to interview by taking a simple random sample. They draw a simple random sample of 1,000 households. After several visits, the interviewers find people at home in only 653 of the sample households. Rather than face such a high non-response rate, the department draws a second batch of households, and uses the first 347 completed interviews in the second batch to bring the sample up to its planned strength of 1,000 households. The department counts 3,087 people in these 1,000 households, and estimates the average household size in the city to be about 3. 1 persons. Too high, since there is a substantial non-response bias that favors larger families that are probably cooped up longer in their houses taking care of their larger families. Ecstasy was a popular drug in the 1990s.