Question

question 2
to determine the size of a difference between two individuals on a measured variable, a researcher must use either an interval or a ratio scale of measurement.
2 pts
true
false
question 3
to compute σx², you first square the scores and then add together the squared scores.
2 pts
true
false

Explanation:

For Question 2: Interval and ratio scales have meaningful differences between values, allowing determination of difference - size. For Question 3: By definition, to compute $\sum X^{2}$, scores are squared first and then summed.

Answer:

Question 2: True
Question 3: True