Degree of freedom is the number of independent values in a sample minus the number of population parameters estimated from that population.

v = n - k

v= degree of freedom

n= number of individual present in a sample

k= number of parameters which are estimated

In the given question, two samples are given. The first sample has 36 participants and second sample has 40 participants. The total degrees of freedom can be calculated as;

v = n

n

v = 36 + 40 - 2

v = 74

v = n - k

v= degree of freedom

n= number of individual present in a sample

k= number of parameters which are estimated

In the given question, two samples are given. The first sample has 36 participants and second sample has 40 participants. The total degrees of freedom can be calculated as;

v = n

_{1}+ n_{2}- kn

_{1}= 36, n_{2}= 40 and k=2v = 36 + 40 - 2

v = 74