Given: The difference between two dependent means is statistically significant. The reason behind this outcome can be difficult to determine when
a. population standard deviations are estimated from samples.
b. sample size is large.
c. a large value of t is obtained.
d. members of a pair are not assigned at random to treatment conditions
I think it is D
Statistics - MathGuru, Wednesday, April 30, 2014 at 5:00pm
See later post.