The number of internal disk drives (in millions) made at a plant in Taiwan durin

Question

The number of internal disk drives (in millions) made at a plant in Taiwan during the past 5 years follows: Disk Drives 140 156 190 200 216 Year 4 a) Using simple linear regression, the forecast for the number of disk drives to be made next year - 238.8 disk drives (round your response to one decimal place) b) The mean squared error (MSE) when using simple linear regression = 25.92 drive' (round your response to one decimal place) c) The mean absolute percentage error (MAPE) when using simple linear regressions | % (round your response to one decimal place)

Explanation / Answer

difference in percentage

year disk drives estimated difference difference square

difference in percentage

1 140 141.2 1.20 1.44 0.86% 2 156 160.8 4.80 23.04 3.08% 3 190 180.4 -9.60 92.16 5.05% 4 200 200 0.00 0 0.00% 5 216 219.6 3.60 12.96 1.67% regression equation 19.6 121.6 MAPE 2.13%

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