How many data points (pieces of data were used to create the regression equation

Question

How many data points (pieces of data were used to create the regression equation?

What is the value of standard error

Based on the below data what will be the value of standard error? Regression Statistics Multiple R R Square Adjusted R Square Standard Error Observations 8 ANOVA MS 25.0 3.33 df Regression Residual Total 25 20 7.51 6 7 P-value 0.007248 0.158349 Coefficients Intercept Advertising (thousands of $) Standard Error 31.274666 6.19330674 t Stat 3.984284 1.610802 -2 Answer Format: Number: Round to: 2 decimal places

Explanation / Answer

n = TOTAL df +1 = 7+1 = 8, as n-1=df

So, a total of 8 data points were used in the regression exercise

The value of standard error is given by : sqrt(Sum of squares of errors/residuals/n) = sqrt( 20/8) = 1.581

Value of standard error = 1.581

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