12. Regression

A small business tracks how advertising spending relates to weekly sales.

$\left(A\right)$ Plot Advertising Spending (x) vs Sales (y) & find the regression line & correlation coefficient.

A small business tracks how advertising spending relates to weekly sales.

$\left(B\right)$ Predict what the business would make in weekly sales if they spent \$400 in advertising.

A small business tracks how advertising spending relates to weekly sales.

$\left(C\right)$ Create a prediction interval for the value in part $\left(B\right)$.

A small business tracks how advertising spending relates to weekly sales.

$\left(D\right)$ Are the actual sales numbers for weeks with \$400 ad-spending within the interval?