For the information given

For the information given

For the information given, what is the calculation to find the degrees of freedom for regression analysis.Standard Errors in ParenthesesWhere:Q = Sales in Thousands of UnitsP = Price in DollarsInc = Consumer Income in Thousands of DollarsAd = Advertising Expenditure in Millions of DollarsR2 = 0.6713; The equation was estimated using 35 years of quarterly data.

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