QUIZ - Solano Community College
Sections 1.1 and 1.2
I. A politician is interested in the opinions of adult residents of Solano County. He uses voter registration records to locate and interview 400 adult Solano residents.
1. Identify the population.
2. Identify the sample.
3. Is this a simple random sample (SRS) of the population? Why?
II. In a school district there are 1250 second grade students in 50 classes (each with approximately 25 students). A school psychologist for the district wants to test around 100 of these second grade students.
1. Describe how she would choose a SRS of 100 second graders.
2. Describe how she would choose a stratified sample of 100 second graders. (Each class is a stratum.)
What are the advantages of this method?
3. Describe how she would choose a cluster sample of 100 second graders. (Each class is a cluster.)
What are the advantages of this method?
4. Describe how she would choose a systematic sample of 100 second graders.
III. In order to obtain information on the cars on the road in California a simple random sample of automobiles registered in California is taken.
Determine if each of the following variables on these cars is categorical (C) or quantitative (Q) and if categorical, label as ordinal or nominal and if quantitative, label as discrete or continuous.
1. Make
2. Model year
3. Weight
4. Maximum number of passengers
5. EPA highway gas mileage
6. Color
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