A 95% Confidence Interval For $\mu _ { D }$ The True Mean Difference in Paired Data, Where

Multiple Choice

A 95% confidence interval for $\mu _ { D }$ the true mean difference in paired data, where $\bar { d } = 20 , s _ { D } = 12$ $\text { and } n = 15$ is determined by

A) 20 $\pm$
2) 048 (0.80)
B) 20 $\pm$
2) 145 (3.098)
C) 20 $\pm$
2) 131 (0.894)
D) 20 $\pm$
1) 761 (1.118)
E) 20 $\pm$
1) 753(1.291)