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In: Statistics and Probability

How can u solve the following question by using the method: Computing trend and seasonal factor...

How can u solve the following question by using the method: Computing trend and seasonal factor from linear regression line (without excel)

Question:

The following table shows the past two years of quarterly sales information. Assume that there are both trend and seasonal factors and that the seasonal cycle is one year.

sales per quarter: 215, 240, 205, 190, 160, 195, 150, 140

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