1) Given the following pairs of z values, find the areas under the normal curve between each pair of z values Refer to the table in Appendix B1. ( Round the final answers to 4 decimal places)

a) z= -0.75 and z= 1.25

b) z = -2.6 and z= -2

c) z = 1.42 and z= 2.73

d) z = -2.3 and z = 1.04

2) A normal population has a mean of 18.2 and a standard deviation of 3. Refer the table in Appendix B1 .

a) Compute the z value associated with 25.0? ( final answer to 2 decimal places)

z=

b) What proportion of the population is between 18.2 and 25.0? ( final answer to 4 decimal places)

Proportion=

c) What proportion of the population is less than 18.0? ( final answer to 4 decimal places)

Proportion=