Statistical Sciences 1024A/B Chapter Notes - Chapter 8: Convenience Sampling, Mobile Phone, Asteroid Family
24 Sep 2015
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8. 1: (a) the population is (all) college students. (b) the sample is the 104 students at the researcher"s college who returned the questionnaire. 8. 2: the population is all the artifacts discovered at the dig. The sample is those artifacts (2% of the population) that are chosen for inspection. 8. 3: (a) the population is all 45,000 people who made credit card purchases. (b) the sample is the 137 people who returned the survey form. 8. 4: it is a convenience sample; she is only getting opinions from students who are at the student center at a certain time of day. This might underrepresent some group: commuters, graduate students, or nontraditional students, for example. 8. 5: since all the students surveyed are enrolled in a special senior honors class, these students may be more likely to be interested in joining the club (and more willing to pay to do so).
