.
10
20
30
40
106.4
103.5
99.8
110.6
5.67
9.02
7.49
8.13
68%
95%
99%
100%
The mean value for machine 1 is smaller than the mean value for machine 2
The mean values of the two machines are the same
The mean value for machine 1 is larger than the mean value for machine 2
The standard deviation of machine 1 is larger than the standard deviation of machine 2
The standard deviation of machine 1 is smaller than the standard deviation of machine 2
The standard deviations are the same
12.2
13.8
14.5
11.3
8.7
9.3
9.6
9.9