U
|
f
|
f.U
|
_ 2
(U-U)
|
_ 2
f.(U-U)
|
-3
|
1
|
-3
|
11.86419
|
11.86419
|
-2
|
6
|
-12
|
5.97530
|
35.8518
|
-1
|
23
|
-23
|
2.08641
|
47.98743
|
0
|
48
|
0
|
0.19753
|
9.48144
|
+1
|
39
|
39
|
0.30864
|
12.03696
|
+2
|
20
|
40
|
2.41975
|
48.395
|
+3
|
5
|
15
|
6.53086
|
32.6543
|
+4
|
2
|
8
|
12.64197
|
25.28394
|
|
Ʃf= 144
|
Ʃf.U= 64
|
|
_ 2
Ʃf.(U-U) =223.55506
|
_
U= Ʃf.U / f = 64/ 144= 0.4444444
2 _ 2
(σ)= Ʃf.(U-U) / Ʃf
=223.55506/144
σ = 1.245
|