STAT332 Final: ex4.sol
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= 0. 31(2. 8) + 0. 24(3. 5) + 0. 23(3. 2) + 0. 22(3. 1) = 3. 126. The approximate estimated variance of is sxh. The approximate 95% con dence interval is 3. 13 0. 21. 3. (a) y = 1. 62, s 2 y = 1. 791, v ( y) = s 2 y (1 f )/n = 0. 0348, 95% ci for total thrush is 1783( y . 1. 96q v ( y)) = (2236, 3541). (b) x = 11. 722, b = y/ x = 0. 138, yra = xu b = 1. 8519, compute residuals and their variance e = 0. 398, v ( yra) = s 2.
