Sampling error can be defined by which of the following statements?
a) increased by increasing sample size
b) larger as the diversity of sample values becomes smaller
c) can be minimized by using simple random sampling
d) becomes equal to zero over many samples
Question 2
A researcher predicts that tennis professionals will play better in front of an audience. Less capable tennis players, however, are expected to do better without an audience. The researcher
a. is predicting a main effect for the audience variable.
b. is predicting a main effect for ability of the tennis player.
c. expects an interaction effect to occur.
d. is using a mixed design.
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