(Answered) Distribution of the residuals some statistical methods

Statistics

Distribution of the residuals. Some statistical methods require that the residuals from a regression line have a Normal distribution. The residuals for the nonexercise activity example are given in Exercise 4.75 (page 192). Is their distribution close to Normal? Make a Normal quantile plot to find out.

Exercise 4.75

Find the sum of the residuals. Here are the 16 residuals for the NEA data rounded to two decimal places:

2076_Find the sum of the residuals.png

Find the sum of these residuals. Note that the sum is not exactly zero because of roundoff error.

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