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Practice finding degrees of freedom for a Chi-square test. Goodness of fit categories - 1 Independence...

Practice finding degrees of freedom for a Chi-square test.

Goodness of fit categories - 1
Independence (rows -1)( columns -1)
Homogeneity categories -1
Variance n-1

To look up a p-value for Chi-Square test you need to know the degrees of freedom.

A goodness of fit test has 7 categories. What degrees of freedom do you use?

A test for homogeneity has 9 categories. What is the degrees of freedom, d.f.?

A test for independence has 3 rows and 9 columns. The degrees of freedom are?

A variance is tested with 13 data values. What is the degrees of freedom?

Math   Statistics-And-Probability   
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Answer #1

A goodness of fit test has 7 categories. What degrees of freedom do you use?

Answer. degree of freedom= categories-1=7-1=6

d.f.=6

A test for homogeneity has 9 categories. What is the degrees of freedom, d.f.?

d.f.=categories-1= 9-1 = 8

d.f.=8

A test for independence has 3 rows and 9 columns. The degrees of freedom are?

d.f.=(rows-1)*(columns-1)=(3-1)*(9-1)=2*8=16

d.f.=16

A variance is tested with 13 data values. What is the degrees of freedom?

d.f.=n-1=13-1=12

d.f.=12

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