Given statistics:
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Question (b)
Given statistics:
$\sum x = 511$
$\sum y = 314$
$\sum xy = 19,064$
$\sum x^2 = 34,234.5$
$\sum y^2 = 13,036$
$n = 8$
(i) Determine the linear regression equation using the least squares method.
Step 1: Calculate the means $\bar{x}$ and $\bar{y}$.
$$ \bar{x} = \frac{\sum x}{n} = \frac{511}{8} = 63.875 $$
