Question

Question 10 (1 point)

When students use the bus from their dorms, they have an average commute time of 10.288 minutes with standard deviation 3.9712 minutes. Approximately 82.66% of students reported a commute time greater than how many minutes? Assume the distribution is approximately normal.

Question 10 options:

1)

25.13

2)	We do not have enough information to calculate the value.

3)

4.55

4)

14.02

5)

6.55

Question 11 (1 point)

Suppose that the probability of a baseball player getting a hit in an at-bat is 0.2958. If the player has 20 at-bats during a week, what's the probability that he gets greater than 5 hits?

Question 11 options:

1)

0.0912

2)

0.7498

3)

0.1823

4)

0.5674

5)

0.4326

Question 12 (1 point)

Suppose that the probability of a baseball player getting a hit in an at-bat is 0.2951. If the player has 32 at-bats during a week, what's the probability that he gets no more than 11 hits?

Question 12 options:

1)

0.6668

2)

0.7901

3)

0.0617

4)

0.2099

5)

0.1233

Question 13 (1 point)

Fill in the blanks. Suppose the probability at a light bulb factory of a bulb being defective is 0.13. If a shipment of 167 bulbs is sent out, the number of defective bulbs in the shipment should be around __________, give or take __________. Assume each bulb is independent.

Question 13 options:

1)	4.346 , 21.71

2)	21.71 , 0.13

3)	21.71 , 4.346

4)	167 , 4.346

5)	21.71 , 18.89

Answer 1