Advertising Sales (million USD) ('000USD) X y 9.6 23 46 11.3 60 12.8 54 9.8 28 8.9 33 12.5 25 12.0 31 11.4 36 12.6 88 13.7 90 14.4 99 15.9 1.Using the data above answer the following questions. a)...


Advertising Sales<br>(million<br>USD)<br>('000USD)<br>X<br>y<br>9.6<br>23<br>46<br>11.3<br>60<br>12.8<br>54<br>9.8<br>28<br>8.9<br>33<br>12.5<br>25<br>12.0<br>31<br>11.4<br>36<br>12.6<br>88<br>13.7<br>90<br>14.4<br>99<br>15.9<br>1.Using the data above answer the following questions.<br>a) Recall ei = Yi - Yi. Given that Xi = 8.9, find the value of and all other values of ei. Also,<br>check that the sum of the residuals should be zero also find Sum of Squared Errors (SSE).<br>b) Decomposition of the Variation in Y:<br>How do the actual and predicted Y values differ from the average value of Y?<br>TOTAL VARIATION:<br>find this variation for X i = 9.8. Find SST.<br>EXPLAINED VARIATION:<br>find this variation for X i 5. Find SSR.<br>c)Find and interpret the Coefficient of Determination using your previous calculations.<br>986<br>

Extracted text: Advertising Sales (million USD) ('000USD) X y 9.6 23 46 11.3 60 12.8 54 9.8 28 8.9 33 12.5 25 12.0 31 11.4 36 12.6 88 13.7 90 14.4 99 15.9 1.Using the data above answer the following questions. a) Recall ei = Yi - Yi. Given that Xi = 8.9, find the value of and all other values of ei. Also, check that the sum of the residuals should be zero also find Sum of Squared Errors (SSE). b) Decomposition of the Variation in Y: How do the actual and predicted Y values differ from the average value of Y? TOTAL VARIATION: find this variation for X i = 9.8. Find SST. EXPLAINED VARIATION: find this variation for X i 5. Find SSR. c)Find and interpret the Coefficient of Determination using your previous calculations. 986

Jun 07, 2022
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