To examine the study habits of college students at a local community college a sample of students was needed to complete a questionnaire. Which of the following will most likely result in an unbiased sample?
1.Using the student directory of on-campus housing as the sampling frame and randomly selecting 20 students from the list
2.Posting a sign for student volunteers in the campus center
3.Asking the first 20 students who enter the library Saturday morning
4.Using the list of enrolled students, obtained from the registrar, as the sampling frame and randomly selecting 20 students from the list
Q. 2Dividing the students at a particular college according to their status as a traditional or nontraditional student, then randomly selecting 1 out of every 200 students in the strata is an example of what kind of sampling?
1.systematic random sampling
2.simple random sampling
3.proportional random sampling
4.stratified random sampling
Q. 3Which is an example of a cluster sample?
1.Dividing on-campus students according to the dormitory in which they live, then randomly selecting 10 students from each dormitory
2.Dividing the students according to their status as a traditional or nontraditional student, then randomly selecting 1 out of every 200 students in the strata
3.Dividing the students according to their major, then randomly selecting 5 of the majors and including those students in the sample
4.Dividing the students by off-campus or on-campus students, then randomly selecting 10 of each group to include in the sample
Q. 4Which is an example of a stratified random sample?
1.Dividing on-campus students according to the dormitory in which they live, then randomly selecting 10 students from each dormitory
2.Dividing the students according to their status as a traditional or nontraditional student, then randomly selecting 1 out of every 200 students in the strata
3.Dividing the students according to their major, then randomly selecting 5 of the majors and including those students in the sample
4.Dividing the students by off-campus or on-campus students, then randomly selecting 10 of each group to include in the sample
Q. 5Which is an example of systematic random sampling?
1.Distributing 20 surveys to a group of friends
2.Selecting and contacting every seventh student from the list of current students
3.Handing out surveys to all currently enrolled students and asking that they return the completed surveys to the library
4.Using a random number generator to select 20 student identification numbers and having those 20 students complete a survey
Q. 6Which is an example of simple random sampling?
1.Distributing 20 surveys to a group of friends
2.Selecting and contacting every seventh student from the list of current students
3.Handing out surveys to all currently enrolled students and asking that they return the completed surveys to the library
4.Using a random number generator to select 20 student identification numbers and having those 20 students complete a survey
Q. 7Each evening on the cable news networks, viewers are asked to call in or email their answers to the Question of the Day. This is an example of what type of sampling?
1.volunteer sampling
2.convenience sampling
3.stratified random sampling
4.simple random sampling
Q. 8What people were surveyed?
Q. 9What is the variable of interest in this study?
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