1. Normal Distribution. A normal distribution is informally
described a a probability distribution that is bell shaped when
graphed. Drwa a rough sketch of a curve having the bell shape that
is characteristic of a normal distribution.

2.Notation. What does the notation z@ indicate?

In Exercise 3- 9. Assume that a randomly selected subject is
given a bone density test. these test score are normally
distributed with a mean of zero and a standard deviation of 1. in
each case, draw a graph and find the probability of the given
scores.

3. less than -o.19

4. less than 1.96

5. greater than 1.82

6. greater than -0.84

7. between -1.93 and -0.45

8. between -0.62 and 1.78

9. greater than -3.80