4.1.4

2 (a) (b) F(x) F(x) ( c ) (d) 1) The cdf which is not valid is. O cdf a O cdf b O cdf d 2) If the correct model is cdf c, the probability of a service time less than 2 hours is O near 0 O 0.2 O 0.5 3) According to the model depicted in cdf a, the probability of a service time completion in the first hour is_ - the probability the service is completed in the second hour. O lower than O the same as O higher than 4) Jeff takes his car in for service. He hopes to pick the car up no more than 3 hours later. Which cdf should Jeff hope is the correct model? O cdf a O cdf c O cdf d Feedback