Which of the following control techniques available to the researcher controls for both known and unknown variables? a. Building the extraneous variable into the design b. Matching c. Random assignment d. Analysis of covariance

Which of the following control techniques available to the researcher controls for both known and
unknown variables?
a. Building the extraneous variable into the design
b. Matching
c. Random assignment
d. Analysis of covariance
by

1 Answer

Answer :

c. Random assignment
by

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