(7) In February, the average snow accumulation in Pittsburgh is 10.7 inches with standard deviation 1.6 inches, and this variable is normally distributed.

a. What range of snow accumulation would be defined by within one standard deviation of the mean?

b. What range of snow accumulation would be defined by within two standard deviations of the mean?

(1) Use the table to quantify the areas under the Standard Normal Distribution:

a. To the left of z = - 0.75

b. To the right of z = 1.23

c. Between z = 1.12 and 1.18.

(2) Find the z-scores that give the areas described below:

a. Area to the left is 0.6591.

b. Area to the right is 0.0392.

c. The area between two z-scores is 0.1782. The first is z = 0.66. Find the second z-score.

c. The area between two 2-scores is 0.1782. The first is