56 
TABLE 4.11:1. 
Investigation (a). Chi -values according to Bartlett's test. Series nr 4-15 every day. Testing differences of 
standard deviations. 
Operator nr 
11/2-63 
12/2-63 
13/2-63 
18/2-63 
1 
37.1 
80.1 
18.5 
14.4 
Highly sign. 
Highly sign. 
Not sign. 
Not sign. 
2 
7.3 
21.3 
50.2 
10.8 
!.. 
Not sign. 
Almost sign. 
Highly sign. 
Not sign. 
3 
65.1 
24.4 
103 
1.3 
Highly sign. 
Almost sign. 
Highly sign. 
Not sign. 
4 
27 
39 
9.8 
19.15 
Sign. 
Highly sign. 
Not sign. 
Not sign. 
TABLE 4.11:2. 
2 
Investigation (b). Chi -values according to Bartlett's test. All series during a day. Testing differences of 
standard deviations. 
Operator nr 
4/3-63 
6/3-63 
1 
. 8.90 
12.63 
2 
7.36 
0. 83 
3 
14.84 
6.76 
4 
9.09 
11.09 
4 
12.16 
17.18 
... 1 
No value is significant.