Exercise

# Practicing interpretation

Fit a multiple regression model for the total auction price of an item in the `mario_kart`

data set as a function of the starting price and the duration of the auction. Compute the coefficients and choose the correct interpretation of the `duration`

variable.

Instructions

**50 XP**

##### Possible Answers

- For each additional day the auction lasts, the expected final price declines by $1.51, after controlling for starting price.
- For each additional dollar of starting price, the expected final price increases by $0.23, after controlling for the duration of the auction.
- The duration of the auction is a more important determinant of final price than starting price, because the coefficient is larger.
- The average auction lasts 51 days.