Measure
|
Class
|
Set size
|
\(\overline {X}\)
|
S
|
TN
|
t-test
|
---|
Δ
x
205
|
target
|
18
|
1.7(5)
|
2.2(4)
|
0.71
|
2·10−8
|
|
versus
|
15
|
–4.6(6)
|
2.4(5)
|
0.26
| |
Δ
x
21
|
target
|
19
|
–6.5(3)
|
1.4(2)
|
0.53
|
0.90
|
|
versus
|
16
|
–6.6(6)
|
2.4(4)
|
0.94
| |
x
U6
|
target
|
19
|
25.0(3)
|
1.4(2)
|
0.40
|
0.14
|
|
versus
|
16
|
25.8(5)
|
1.9(3)
|
0.25
| |
y
DV
|
target
|
18
|
4.9(5)
|
2.0(3)
|
0.96
|
5.5·10−11
|
|
versus
|
15
|
–1.3(4)
|
1.7(3)
|
0.98
| |
y
opt
|
target
|
18
|
6.9(5)
|
1.9(3)
|
0.78
|
2.6·10−11
|
|
versus
|
15
|
0.7(4)
|
1.6(3)
|
0.24
| |
- The digits in parentheses correspond to the uncertainty on the respective least significant digits. The column marked with TN (test of normality) contains the p-values yielded by the Shapiro-Wilk test to check whether the data contained in a histogram are consistent with a normally distributed parent population. Finally, the rightmost column reports the p-value of Student’s t-test to check the null hypothesis that the target and versus sets have the same population mean; to this purpose, the variance is estimated separately for each group and the Welch modification to the number of degrees of freedom is used