Statistics HW chapter 14.xlsx

Statistics HW chapter 14.xlsx - Question 2 Question 4 Xi Xi...

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Question 2 Question 4 Xi Xi Yi 67 3 55 45 12 40 73 6 55 54 20 10 61 14 15 A. A B. Theres a positiv B. It appreasr to be a negative relationship between x & y and the percentag C. Shown on graph C. Many different E. 38 D. x= 300/5= 30 (xi-x)(yi-y)=624 b1 = 624/480=1.3 b0 = 43-1.3(60) = - y = -35+1.3x E. -35 +1.3x = -35+ D. ẏ=68-3x 2 4 6 8 10 12 14 16 18 20 22 0 10 20 30 40 50 60 40 0 10 20 30 40 50 60 70
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Yi 49 21 65 47 33 ve linear relationship between the percentage of the women wokring in the five companies(x) ge of management jobs held by women in the compnay(y) straight lines can be drawn to provide a linear approximation of the relationship between x and y y = 215/5=43 3 -35 +1.3(60) = 43% (xi-x)²=480 45 50 55 60 65 70 75 Scattered Plot
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Question 10 Age Price 36 256 20 142 29 212 33 255 41 331 27 173 30 209 45 297 34 237 22 182 A. B. The scatter diagram indicates a positive linear relationship between x = age of wine and y = price of a 750 ml bottle of wine. In other words, the price of the wine increases with age C. x = 317/10=31.7 y = 2294/10 =299.4 (xi-x)(yi-y)= 3838.2 (xi-x)²= 522.1 b0 = 3838.2/552.1 = 6.952 b0 y-bix = 229.4 - (6.952)(31.7) = 9.0216 y = 9.0216+6.952x D. The slope of the estimated regression line is approximately 6.95.
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