Question

Production Volume (units) Total Cost ($) 400 4000 450 5000 550 5400 600 5900 700 6400...

Production Volume (units) Total Cost ($)
400 4000
450 5000
550 5400
600 5900
700 6400
750 7000
Production Target Est. Cost ($)
500
  • Compute b1 and b0 (to 1 decimal).

    b1

    b0

    Complete the estimated regression equation (to 1 decimal).

    y = ... + x

  • According to this model, what is the change in cost (in dollars) for every unit produced (to 1 decimal)?

  • Compute the coefficient of determination (to 3 decimals). Note: report r2 between 0 and 1.

    r2 =

    What percentage of the variation in total cost can be explained by the production volume (to 1 decimal)?

    ... %

  • The company's production schedule shows 500 units must be produced next month. What is the estimated total cost for this operation (to the nearest whole number)?

    $ ...

Homework Answers

Answer #1
Production X Total Cost Y X * Y
400 4000 1600000 160000 16000000
450 5000 2250000 202500 25000000
550 5400 2970000 302500 29160000
600 5900 3540000 360000 34810000
700 6400 4480000 490000 40960000
750 7000 5250000 562500 49000000
Total 3450 33700 20090000 2077500 1.95E+08


Equation of regression line is


b = 7.6

a =( 33700 - ( 7.6 * 3450 ) ) / 6
a = 1246.7
Equation of regression line becomes

b0 = 1246.7

b1 = 7.6



r = 0.979

Coefficient of Determination

Explained variation = 0.959* 100 = 95.9%
Unexplained variation = 1 - 0.959* 100 = 4.1%

When X = 500
= 1246.667 + 7.6 X
= 1246.667 + 7.6 * 500
= 5047


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