Reference no: EM132171803

1) The probability of a customer ordering a pumpkin spice latte on Halloween is 23%. What is the probability that three customers, in a row, will order a pumpkin spice latte on Halloween. Assume the events are independent? (ch4)

A.   0.46

B.    0.012

C.    0.69

D.   0.053

2) A school is 40% male students. Looking at a class of 20 students, what is the probability that more than 11 of the students are male?

A. 0.9435

B. 0.0710

C. 0.1275

D. 0.0565

3) A drive thru at a local fast food restaurant averages 6 cars per 30 minutes. What is the probability there will be at least 10 cars in the next hour? (assume Poisson distribution)

A. 0.7576

B. 0.3472

C. 0.1048

D. 0.5385

4) A marathoner is now running his marathons with an average time of 2 hours, and 3 minutes, and a standard deviation of 1 minute and her times follow a normal distribution. What is the probability of the marathoner running a marathon time of less than 2 hours?

A. 0.0014

B. 0.3666

C. 0.2145

D. 0.9914

5)The finishing times for a stock car race uniform. The quickest finishing time is 9 minutes and 30 seconds, and the slowest finishing time is 12 minutes. What is the probability a stock car racer will finish between 10 and 13 minutes?

A. .35126

B. .35

C. .6

D. .8

6) Which of the following would indicate a process has special causes of variation?

A. A point is above the lower control limit and below the upper control limit

B. There are 4 consecutive points with the control limits going up

C. A point is above the upper control limit

D. There are 4 consecutive points below the center line and above the lower control limit

E. A, B and D are correct