Normal Distribution Review Questions    

1. For a normally distributed population with mean of 15 and standard deviation of 3, what is the probability that an observation from that population will be between 10 and 20:

45.2%
90.4%
95.2%
99.9%

2. For a normally distributed population with mean 67 and standard deviation 13, what is the probability that an observation will be greater than 70?:

23.1%
40.9%
59.1%
99.7%

3. For a normally distributed population with mean of 3.35 and standard deviation 0.75, what is the probability that an observation will be below 3.0?:

20%
32%
68%
99%