21 
TABLE 1 
Computations for a normal distribution test of residuals from grid measurement in a stereo 
comparator 
Class 
means 
Number 
of 
ft 
ft 2 
Class 
limits 
Standardized 
cl. limits 
(b-x):s 
up 
f-'tP 
(fnpУ 
t 
Cum) 
values 
/ 
b 
(A<m) 
p 
np 
2.60 
2.781 
2.40 
1 
2.4 
5.76 
2.20 
2.353 
0.009 3 
1.58 
2.oo 
1 
2.0 
4.oo 
1.80 
1.925 
0.0178 
3.03 
4.5 7 
1.83 
1.60 
14 
22.4 
35.84 
1.40 
1.497 
0.0401 
6.82 
1.20 
11 
13.2 
15.84 
1.00 
1.070 
0.075 1 
12.77 
-1.77 
0.25 
0.80 
16 
12.8 
10.24 
0.60 
0.642 
0. 1 1 8 1 
20.08 
— 4.08 
0.8 3 
0.50 
14.5 
7.25 
3.62 
0.40 
0.428 
0.0739 
12.56 
1.94 
0.30 
О.зо 
13.5 
4.05 
1.22 
0.20 
0.214 
0.0810 
13.77 
— 0.27 
0.01 
0. io 
11 
1.1 
0.11 
O.oo 
O.ooo 
0.084 7 
14.40 
— 3.40 
0. 80 
— 0. io 
14 
- 1.4 
0. 14 
— 0.20 
— 0.214 
0.084 7 
14.40 
— 0.40 
O.oi 
— О.зо 
18 
- 5.4 
0.16 
— 0.40 
— 0.428 
0.08 10 
13.77 
4.23 
1.30 
— 0.50 
12 
6.0 
О.зо 
—0.60 
— 0.642 
0.0739 
12.56 
— 0.56 
0.02 
— 0.80 
20.5 
-16.4 
13.12 
— 1.00 
— 1.070 
0.1 1 8 1 
20.08 
+ 0.42 
O.oi 
— 1.20 
11.5 
-13.8 
16.56 
— 1.40 
— 1.497 
0.075 1 
12.77 
-1.27 
0. l з 
— 1.60 
5.5 
- 8.8 
14.08 
— 1.80 
— 1.925 
0.040 1 
6.82 
— 2.00 
5.5 
-11.0 
22.00 
— 2.20 
— 2.353 
0.0178 
3.03 
0.5 7 
О.оз 
— 2.40 
1 
- 2.4 
5.76 
— 2.60 
— 2.781 
0.009 3 
1.58 
I 
о 
r- 
7 
e 
O.o 
148.75 
O.oo 
O.ooo 
1.0000 
170.02 
— 0.02 
5.52 
0.93 5 ¡im (micron) 
5c = O.oo ¡um 
Note that if a value coincides with a class limit it is counted with half a 
unit to each of the two adjacent classes. 
Degrees of freedom = 12-3 = 9; chi\ 0/o = 16.92>5.52. 
Hence, the normal distribution hypothesis is accepted.