Question: Teach for America, part II The study described in Exercise R5.21 also looked at scores in mathematics and language. Here are software outputs for the

Teach for America, part II The study described in Exercise R5.21 also looked at scores in mathematics and language.

Here are software outputs for the appropriate tests. Explain what they show.

Mathematics T-TEST OF Mu(1) - Mu(2) = 0 Mu(Cert) - Mu(NoCert) = 4.53 t(86) = 2.95 p = 0.002 Language T-TEST OF Mu(1) - Mu(2) = 0 Mu(Cert) - Mu(NoCert) = 2.13 t( 84) = 1.71 p = 0.045

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