A large group of adults are classified into four groups according to their highe

Question

A large group of adults are classified into four groups according to their highest educational degree: High School Diploma, Undergraduate, Masters, and PHD. They are also classified into three categories based on income level as: High, Moderate and Low.   

If we are only interested in whether there is equal distribution of income in that population which statistical analysis should be used in this case?

part 2:

If we are interested in whether income is dependent on highest educational degree in that population, how many degrees of freedom are there for the statistical test you would conduct in this case?

Explanation / Answer

Ans:

1)

Chi-square goodness-of-fit test

Option c is correct.

2)in this case we concduct chi square test of independence

r=4,c=3

so,df=(4-1)*(3-1)=3*2=6

Option b is correct.

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