In an independent-group design, we find: Group 1 Group 2 n1 = 18

Question: In an independent-group design, we find:

Group 1	Group 2
n1 = 18	n2 = 14
s₁² = 16	s₂² = 20
Ybar₁ = 30.1	Ybar₂ = 27.7

(a) Find the 95% confidence interval for ${{\mu }_{1}}-{{\mu }_{2}}$. Assuming we wish to test ${{H}_{0}}:{{\mu }_{1}}={{\mu }_{2}}$ against the two-tailed alternative, what can we conclude?

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In an independent-group design, we find: Group 1 Group 2 n1 = 18

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