χ
2
=
(
35
−
31.5
)
2
31.5
+
(
17
−
20.5
)
2
20.5
+
(
13
−
15.2
)
2
15.2
+
(
12
−
9.8
)
2
9.8
+
(
29
−
30.3
)
2
30.3
+
(
21
−
19.7
)
2
19.7
=
1.95
Description:
Math equation.