Question: An analyst is using a linear regression model to predict stock prices for a company. To evaluate the effectiveness of his model, he is going

An analyst is using a linear regression model to predict stock prices for a company. To evaluate the effectiveness of his model, he is going to study the spread of the residuals. Based on his calculations, the residuals for the points are as follows. Find the standard deviation of the residuals.

residuals
-1.5
-0.7
0.4
1.2
0.2
0.2
0.2

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