Concept: chi-square test of independence
The following table describes the member ship of political parties with different levels
|
|
Upper
|
Middle
|
Lower
|
|
Member of political party
|
30
|
16
|
22
|
|
Not a member
|
12
|
20
|
10
|
To test whether the claim that the membership in political parties is the same for lower, middle and upper-class individuals at 5% level of significance.
Compute test statistic:
Calculate Expected values of the given data.