Chapter 9.3, Problem 17P

(b)

To determine

Verify the data set $\left(x,y\right)$ for serial correlation.

(b)

To determine

Find the equation of the sample least-squares line $\widehat{y}=a+bx$ by using the sums

Find the predicted number the spending the next year when the per capita spending was $x=\$42$ one year.

(c)

To determine

Find the sample correlation coefficient r.

Find the coefficient of determination $r^2$.

Identify whether the claim $\rho >0$ is significant or not.

Check whether the time series of per capita spending on video games is relatively predictable from one year to the next or not.