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
