Question: If we are comparing two samples each with n=200, what is the formula we use to calculate the standard deviation of the difference in mean?

If we are comparing two samples each with n=200, what is

If we are comparing two samples each with n=200, what is the formula we use to calculate the standard deviation of the difference in mean? X - H X - X, 1.Z obtained = X - U 2.1 brained .3.Z obtained S In Jn - 1 X1 -X2,5.08- 8 5 2 ns +n 25 2 n tn , 4.1 obtained + 6.0 x-8 n tn2 - 2 \\ nin2 Ox-x Vn =1 n2 - 1 O Formula 3 O Formula 1 O Formula 2 Formula 5 O Formula 4 O Formula 6 O None of these formulas are useful to us

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