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79. Jane Doe wants to administer a short survey on “student driving habits” to a representative sample of students at
the local university. She secured a list of students from the student directory. She as-signed each student a unique
number and then used a random number table to select her sample. Jane Doe is most likely using a
probability sampling technique.
cluster sample technique.
judgment sampling technique.
This is an example of a probability sampling technique. See 14–3: Selecting a Sampling
Procedure.
14.04 – List the primary types of probability samples.
80. If we were to ask college students, “To what extent do they value a college degree?”, which type of sample plan
would be most appropriate?
Any probability sampling plan would be useful.
A stratified sample because we would expect the answers to vary by strata: freshmen, sophomore, junior,
and senior.
A cluster sample because we would expect the answers to vary by cluster: freshmen, sophomore, junior, and
senior.
An area sample because we would expect the answers to vary by area: freshmen, sophomore, junior, and
senior.
None of these would be appropriate. In fact, it would be best to use a nonprobability sampling technique.
A stratified sample because we would expect the answers to vary by strata: freshmen,
sophomore, junior, and senior. See 14–3: Selecting a Sampling Procedure.
14.04 – List the primary types of probability samples.
81. Calculation of the sampling interval is important in which sampling plan?