Variable Y represents the profit (in thousand of dollars ) of an indoor heating repairs firm in a small town , over four consecutive months. The variable X1 represents the average outside temperature for the month, and the variable X2 represents the average number of daily customer complements(positive) or complaints(negative). For a month in which X2 is positive there were more complements than complaints but for a month in which X2 is negative there were more complaints than compliments. Using the information about variables Month X1 X2 Y NOVEMBER -5 5 11 DECEMBER -4 4 11 JANUARY -1 8. FEBRUARY 2 -3 2 i. Determine by a matrix method the equation of the line of regression for Y on X1 and X2. Use your results in į. to predict the expected profit of the firm in a month where the average outside temperature was -2 degrees and the average number of daily customers compliment was 3. ii.

Variable Y represents the profit (in thousand of dollars ) of an indoor heating repairs firm in a small town , over four consecutive months. The variable X1 represents the average outside temperature for the month, and the variable X2 represents the average number of daily customer complements(positive) or complaints(negative). For a month in which X2 is positive there were more complements than complaints but for a month in which X2 is negative there were more complaints than compliments. Using the information about variables Month X1 X2 Y NOVEMBER -5 5 11 DECEMBER -4 4 11 JANUARY -1 8. FEBRUARY 2 -3 2 i. Determine by a matrix method the equation of the line of regression for Y on X1 and X2. Use your results in į. to predict the expected profit of the firm in a month where the average outside temperature was -2 degrees and the average number of daily customers compliment was 3. ii.

Advanced Engineering Mathematics

10th Edition

ISBN:9780470458365

Author:Erwin Kreyszig

Publisher:Erwin Kreyszig

Chapter2: Second-order Linear Odes

Section: Chapter Questions

Problem 1RQ

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