Question: Hera Computer Chips Inc. used the three year quarterly data in the table below to determine the regression equation for forecasting: Y = a +

Hera Computer Chips Inc. used the three year

Hera Computer Chips Inc. used the three year quarterly data in the table below to determine the regression equation for forecasting: Y = a + b*X, where X is the time period, a = 46.55 & b = 2.26. and prepared the additional analysis using a multiplicative seasonal index. With this information, calculate the forecast for the fourth quarter of Year IV. Quarter Year Period 1 st 1 1 2nd | 2 3rd 3 4th 4 1st II 5 2nd 6 3rd 4th 8 1 st 9 2nd 10 3rd 11 4th 12 Trend Forecast using Actual Regression Sales equation 48 48.81 41 51.07 60 53.33 65 55.59 58 57.86 52 60.12 68 62.38 74 64.64 60 56 69.17 75 78 73.69 Seasonal Index =Act/Trend 0.98 0.80 1.13 1.17 1.00 0.86 1.09 ======= 66.91 1.14 0.90 0.81 1.05 1.06 71.43

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