Question: QUESTION 23 In testing for the differences between the means of 2 independent populations where the variances in each population are unknown but assumed equal,what

QUESTION 23

In testing for the differences between the means of 2 independent populations where the variances in each population are unknown but assumed equal,what are the degrees of freedom?we know their sample sizes are 10 and 12, respectively.

	A.	20
	B.	21
	C.	22
	D.	23

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