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
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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• Spring '14
• LeonardPresby
• Harshad number, Garmin, Garmin Nuvi

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