Correlation and regression

2) Solution : -

Let us assume that Prices (In Rs) are variable X and sales units are variable Y.

Calculation of Karl Pearson’s coefficient of correlation : -

Here,

$\sum X = 915$

$\sum y = 6850$

$X̂ = \frac{\sum X}{n} = \frac{915}{10} = 91.5$

$ŷ = \frac{\sum y}{n} …