Question: If we are testing for presuming equal variances with samples of n = 19 and n = 19, the number of degrees of freedom is

If we are testing for presuming equal variances with samples of n = 19 and n = 19, the number of degrees of freedom is equal to
If we are testing for presuming equal variances with samples of

presuming equal variances with samples of n1=19 and n2=19, the number of degrees of freedom is equal to

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