A family drove from Philadelphia to Chicago over two days. The first day they drove 515 miles in 8 hours. The second day they drove 235 miles in 4.5 hours. What was their average
speed in miles per hour over both days?

Is the response to the survey question "did you smoke in the last week question mark "response to the survey question "did you smoke in the last week? " a discrete random variable, a continuous random variable, or not a random variable?