3) A coworker is considering the use of a log linear (power) model using weight

Question

3) A coworker is considering the use of a log linear (power) model using weight to estimate the cost of a missile engine. They have performed the following calculations in log space using natural logarithms. Select the corresponding unit space form of this power model equation.

Log Space b1 = 1.109438 Log Space b0 = -0.122932

   Cost = 0.884324 (Weight) 1.109438

   Cost = 0.884324 + 1.109438 (Weight)

   Cost = 2.421347 (Weight) 1.109438

   Cost = 1.109438 + 0.884324 (Weight)

3) A coworker is considering the use of a log linear (power) model using weight to estimate the cost of a missile engine. They have performed the following calculations in log space using natural logarithms. Select the corresponding unit space form of this power model equation.

Log Space b1 = 1.109438 Log Space b0 = -0.122932

   Cost = 0.884324 (Weight) 1.109438

   Cost = 0.884324 + 1.109438 (Weight)

   Cost = 2.421347 (Weight) 1.109438

   Cost = 1.109438 + 0.884324 (Weight)

Explanation / Answer

b1 = slope = 1.109438

b0 = intercept = -0.122932

Hence regression equation will be

y = 1.109438 x+anti log of (-0.122932) where x is weight and y is cost

Proper choice will be hence

Cost = 1.109438 (weight)+0.884124

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