Measurement error refers to
a. the results of mistakes made by the examiner during the testing procedure.
b. the mistakes made by the person taking a test.
c. random variability in scores that is outside the control of the researcher.
d. the variability in scores resulting from the manipulation of an independent variable.
Question 2
A stable trend within a phase is defined as a set of observations that ____.
a. cluster around a horizontal line when graphed
b. cluster around a vertical line when graphed
c. cluster around a sloping line when graphed
d. all have exactly the same magnitude