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Compute the least squares line from summary statistics

Question 1 of 8

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The least squares line predicts the response variable \(y\) from the explanatory variable \(x\)

Summary valueGiven
\(r\)0.9
\(\bar{x}\)21.6
\(s_x\)2.9
\(\bar{y}\)8.9
\(s_y\)2.3
(a)1 mark

Calculate the least squares slope b to 2 decimal places

Format: 2 d.p.
(b)1 mark

Calculate the intercept a to 2 decimal places. Do not use a rounded value of b

Format: 2 d.p.
(c)1 mark

Which equation is the least squares line?