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For an independent samples t test with N 1 = 15, N 2 = 13, X 1 = 30, X 2 = 27, SS 1

For an independent samplesttest withN1= 15,N2= 13,X1= 30,X2= 27,SS1= 780, andSS2= 520, thetobtvalue is ___________.

A. 0.42

B. 1.12

C. 0.80

D. 1.55

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