Q8. Calculator required. In a regression study to estimate the line Y = aX + b using a sample of X and Y values, the following statistics were obtained: n- 10, ΣXY200; ΣX = 25 ; Σ Υ = 40; Σ X2 = 162.5 What are the estimates of the slope, a and intercept, b using the formulae: a =Y –bX , A_ΗΣΧΥ-ΣΧΣΥ nEX-(EX) A. a = 1.5, b = 1 B. a = -5, b = 0 C. a= 0; b = 0.6 D. a = 2, b = – 0.6. O A. A ОВ. В о С. С O D. D

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