College

The number of degrees of freedom associated with the chi-square distribution in a test of independence is:

A. Number of sample items minus 1.
B. Number of populations minus number of estimated parameters minus 1.
C. Number of populations minus 1.
D. Number of rows minus 1 times number of columns minus 1.

Answer :

Answer:

d) the number of rows minus 1 times number of columns minus 1

The degrees of freedom γ= (r-1)(s-1)

Step-by-step explanation:

chi-square distribution:-

In this chi-square test , we test if two attributes A and B under consideration are independent or not .

here we will choose null hypothesis (H₀): Attributes are independent

Degrees of freedom : γ= (r-1)(s-1)

where r = number of rows

and 's' = number of columns

chi - squared test

Χ² = ∑(O-E)²/ E

'O' be the observed frequency

'E' be the Expected frequency

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