An experiment was conducted to compare the reaction times of a group of 10 volunteers (from a psychology class) to a bright light versus the sound of a loud air horn. When signaled with either the light or horn, the individual was asked to press a button to turn off the light or to turn off the horn. A special timing device monitored the reaction times (expressed in seconds):
|
Subject
|
Light(X)
|
Horn(Y )
|
|
1
|
0.31
|
0.29
|
|
2
|
0.37
|
0.30
|
|
3
|
0.41
|
0.38
|
|
4
|
0.33
|
0.35
|
|
5
|
0.21
|
0.25
|
|
6
|
0.38
|
0.29
|
|
7
|
0.38
|
0.31
|
|
8
|
0.47
|
0.37
|
|
9
|
0.95
|
0.21
|
|
10
|
0.25
|
0.22
|
Find a 95% confidence interval for µD = µX - µY .