Question: please answer step by step 7. Q4: Consider the following estimated regression model: (4 marks) Yi= 1222.1250+ 245.3750 D2 + 347.6250 D3-62.1250 D4 Where Yi:

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7. Q4: Consider the following estimated regression model: (4 marks) Yi= 1222.1250+ 245.3750 D2 + 347.6250 D3-62.1250 D4 Where Yi: sales of refrigerators, D2, D3, D4 are dummies for the second, third, and fourth quarters of each year, taking a value of 1 for the relevant quarter and 0 for the first quarter. Note: the coefficients of D3 and D4 are statistically significant while D2 is not. What is the interpretation of the coefficients of D2, D3, D4?* (4 Points) Enter your

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