Question: 7 iv and v please 6. (10 points) Exercise 2.10 in SBE on page 72. 7. (10 points) Let i be the sample mean. Show

7 iv and v please

6. (10 points) Exercise 2.10 in SBE on page 72. 7. (10 points) Let i be the sample mean. Show the following statements: (i) _ (xi - ) = 0; (ii) 62 = 214121 - 12; (iii) E (xi - x) (yi - y) = EL (xi - ) yi = Exi(yi - y); (iv) EL-1 (xi - I) (yi - y) = niyi - nay; (v) Ell (xi - x) = Ex? - nx2. 8. (10 points) Exercise 2.22 in SBE on page 83

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