D Question 8 1 pts Which of the following is NOT a continuous random variable? 0 Time waiting on the phone for tech support (in seconds) 0 All of the choices are continuous random variables 0 Number of accidents in one year at an intersection 0 Length of time between accidents at an intersection Question 7 1 pts Suppose X has a uniform distribution on the interval [0, 10]. True or false, the mean of X is 5. O Need more information O False O TrueQuestion 3 1 pts Suppose X is a continuous random variable with the pdf defined as below: f ( x ) = 2x2 , 0