Question: Using a probability sample eliminates: a. Bias as a source of error. b. Sampling error. c. Attrition as a threat to validity. d. Subject maturation

Using a probability sample eliminates:

a. Bias as a source of error.
b. Sampling error.
c. Attrition as a threat to validity.
d. Subject maturation as a threat to validity.
e. All of the above.

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