Homework Soursea study of visual and auditory reaction time is conducted fo
a study of visual and auditory reaction time is conducted for a group of college basketball players. Visual reaction time is measured by the time needed to respond to a light signal, and auditory reation time is measured by the time needed to respond to sound of electric switch. 15 subjects were measured with time recorded to the nearest millisecond.
subject visual auditory
1 161 157
2 203 207
3 235 198
4 176 161
5 201 234
6 188 197
7 228 180
8 211 165
9 191 202
10 178 193
11 159 173
12 227 137
13 193 182
14 192 159
15 212 156
Is there evidence that the visual reaction time tends to be slower than the auditory reaction time?
use the Wilcoxon signed rank test!!!
Solution
Null hypothesis: H0: visual reaction time is equals to the auditory reaction time
Alternative hyp: H1: visual reaction time tends to be slower than the auditory reaction time
From SPSS
Conclusiuon: P value=0.111 > alpha(0.05) , we accept the null hypothesis.
| Ranks | ||||
| N | Mean Rank | Sum of Ranks | ||
| auditory - visual | Negative Ranks | 9a | 9.78 | 88.00 |
| Positive Ranks | 6b | 5.33 | 32.00 | |
| Ties | 0c | |||
| Total | 15 | |||
| a. auditory < visual | ||||
| b. auditory > visual | ||||
| c. auditory = visual |
