Callie is working on a project for her psychology class. She is having trouble getting participants for her study. Therefore, she has begun to ask those who do participate for names of other individuals who might be willing to participate.
What type of nonprobability sampling procedure is Callie using?
a. quota
b. convenience
c. cluster
d. snowballing
Question 2
This chapter outlined ____ questions that you can ask yourself to determine if threats to internal validity are present in a study.
a. 35
b. 20
c. 15
d. 10
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Student Raises Hand in Class
Another class of dihydrofolate reductase inhibitors is exemplified by trimethoprim