The predicted value of peak power load when maximum temperature is 84 using a linear regression model is 148
Given the table :
- X __ 95 __ 82 __ 90 __ 81 ___ 99 __ 100
- Y __ 214 _ 152 __ 156 __ 129 _ 254 _ 266
Using technology, such as Excel or a linear regression calculator, we could obtain the linear equation model of the data in the form ;
- y = Predicted power load
- x = maximum temperature
- b = slope
- c = intercept
Using a regression calculator, The regression model obtained is :
y = 6.630x - 409.228
Using the model equation ; the peak power load when maximum temperature is 84 can be calculated thus :
Substitute x = 84 into the equation
y = 6.630(84) - 409.228
y = 147.692
y = 148 (nearest whole number)
Therefore, the predicted peak power for when maximum temperature is 84 will be 148
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