# b226s10a11

Document Sample

```					1. True or False: The probability that a standard normal random variable, Z, is below 1.96 is
0.4750.

2. True or False: The probability that a standard normal random variable, Z, is between 1.00 and
3.00 is 0.1574.

3. True or False: The probability that a standard normal random variable, Z, falls between –2.00
and –0.44 is 0.6472.

4. The amount of time necessary for assembly line workers to complete a product is a normal
random variable with a mean of 15 minutes and a standard deviation of 2 minutes. The
probability is __________ that a product is assembled in less than 12 minutes.

5. The amount of time necessary for assembly line workers to complete a product is a normal
random variable with a mean of 15 minutes and a standard deviation of 2 minutes. The
probability is __________ that a product is assembled in between 14 and 16 minutes.

6. The amount of time necessary for assembly line workers to complete a product is a normal
random variable with a mean of 15 minutes and a standard deviation of 2 minutes. The
probability is __________ that a product is assembled in between 16 and 21 minutes.

7. The amount of time necessary for assembly line workers to complete a product is a normal
random variable with a mean of 15 minutes and a standard deviation of 2 minutes. The
probability is __________ that a product is assembled in more than 11 minutes.

8. The amount of time necessary for assembly line workers to complete a product is a normal
random variable with a mean of 15 minutes and a standard deviation of 2 minutes. So, 15% of the
products require more than __________ minutes for assembly.

9. The amount of time necessary for assembly line workers to complete a product is a normal
random variable with a mean of 15 minutes and a standard deviation of 2 minutes. So, 60% of the
products would be assembled within __________ and __________ minutes (symmetrically