Author Question: How are the difference scores coded in a sign test? A) by their ranked size, with increases and ... (Read 63 times)

ahriuashd · **on:** Jun 20, 2018

How are the difference scores coded in a sign test?

A) by their ranked size, with increases and decreases ranked separately
B) by their ranked size, independent of sign (increase or decrease)
C) as increases (+) or decreases ()
D) as probabilities, p and q

Question 2

A researcher uses a repeated-measures design to compare individuals' performance before treatment with their performance after treatment. If all of the participants show improved performance of 8 or 9 points after treatment, then the researcher should find ____.

A) a sample mean difference near zero
B) a t statistic near zero
C) the variance of the difference scores is near zero
D) a very large variance in the difference scores