Question: Problem 3-25 (Static) The sales data for two years are as follows. Data are aggregated with two months of sales in each period. MONTHS January-February

Problem 3-25 (Static) The sales data for two years are as follows. Data are aggregated with two months of sales in each "period." MONTHS January-February March-April May-June July-August September October November-December SALES 109 104 150 170 120 100 MONTHS January-February March-April May-June July-August September October November December SALES 115 112 159 182 126 106 b. Fit a simple linear regression model to the sales data (Do not round intermediate calculations. Round your answers to 2 decimal places.) Y c. In addition to the regression model, determine multiplicative seasonal indexes. A full cycle is assumed to be a full year. (Do not round intermediate calculations. Round your answers to 2 decimal places.) Period Multiplicative Seasonal Index 13 14 15 16 17 18 d. Using the results from parts (b) and (C). prepare a forecast for the next year. (Do not round intermediate calculations. Round your answers to 1 decimal places.) Forecast Months January-February March-April May June July-August September-October November December

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