χ
2
=
Σ
(
Σ
O
j
t
−
Σ
E
j
t
)
2
Σ
E
j
t
=
(
6
−
2.620
)
2
2.620
+
(
3
−
6.380
)
2
6.380
=
4.360
+
1.791
=
6.151
Description:
Math equation.