1. A project has an expected completion time of 25 weeks and a variance of 25. What is the probability that the project can be finished in greater than 30 weeks?

0.42

0.84

0.16

1

2. In a queueing system, the elapsed time between consecutive arrivals is 3 minutes on average. The mean arrival rate is

20 arrivals per hour.

30 arrivals per hour.

20 arrivals per minute.

3 arrivals per minute.

3. Mona is responsible for two machines whose average time between breakdowns is 10 days, distributed according to the exponential distribution. It takes about 1 day to repair one machine. Find the value of probability that the system is idle.*

0.82

0.18

0.91

None of the above

4. The overall significance of a regression model is tested using an F-test. If c is the level of significance, the model is significant if*

the F-value is low.

the value c is low.

the slope is lower than the intercept.

the p-value of the F-value is lower than c .

5. The overall significance of a regression model is tested using an F-test. If c is the level of significance, the model is significant if*

the F-value is low.

the value c is low.

the slope is lower than the intercept.

the p-value of the F-value is lower than c .