A Test of Abstract Reasoning Is Given to a Random

Multiple Choice

A test of abstract reasoning is given to a random sample of students before and after they completed a formal logic course.The results are given below.Construct a 95% confidence interval for the mean difference between the before and after scores if
(before-after) = 3.7 and
= 4.945

A) (1.2,5.7)
B) (0.2,7.2)
C) (0.8,6.6)
D) (1.0,6.4)
E) (-4.4,11.8)