You have just learned of survey results conducted by your university on the drinking behaviors of the college campus.
Wondering about the results, you ask yourself the following questions: how were participants selected, were participants selected depending on if they lived on- or off-campus, were all the participants in a sorority or fraternity, were nontraditional age students included in the survey, and were men and women equally sampled? These types of questions indicate that you are concerned about what threat to internal validity?
a. history
b. selection
c. maturation
d. regression to the mean
Question 2
A participant dropping out of a study or not returning to complete additional parts to a study is known as __________.
a. attrition.
b. mortality.
c. fatigue.
d. carry over effects.
Results of selective breeding for oil content in corn plants.
John Hopkins University
McGill University's Gault Nature Reserve on Mont-Saint-Hilaire, Quebec.
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Are the resutls from the glucose strip test consistent with the results obtained from the ...