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4. (Graduate) Show that
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B = Say = Sa 5(2-a) (81-9) {(xi- 2 - RSS (0-2) Sad sie. (B) = MRSS Sax Bi Siece = Sxy xn-2 ssna sax RSS . ſsan Rss Let us mulrin-2 sieco) RSS ✓ TSS we know that r2 = - → Rss TSS SSR TSS - -R2 - RSS ISS s. e. (B) T-RE

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