1. Which of the following is an appropriate confidence interval to indicate significance for a risk difference of -2.4? 2. A. -2.5 to 0.67 B. 2.4 to 3.6 C. -2.5 to -1.4 D. -2.5 to 1.9

Question

1. Which of the following is an appropriate confidence interval to indicate significance for a risk difference of -2.4? 

A.	-2.5 to 0.67
B.	2.4 to 3.6
C.	-2.5 to -1.4
D.	-2.5 to 1.9

Answer 1

Option C: -2.5 to -1.4

This range indicates significance for a risk difference of -2.4 because it does not include zero.