In class #5 February 9th

1. Power Point ch 3 slide #13

a. What percent is less than 3.74?

b. What percent is between 5.29 and 9.94?

c. What percent is greater than 3.74?

d. What percent is between 3.74 and 11.49?

2. Use Table A and find

a. P( z < 0.81)

b. P( -1.25 < z < 0.81)

c. P (z < -1.25 or z > 0.81)

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Homework #5 February 9th

In book

3.2, 3.3, 3.4, 3.5, 3.7

extra problems. Use Table A

1. a. P( z < 3)

b. P( z > -1.2)

c. P(1.8 < z < 2.6)

d. P(z < -2.5) or P(z > 1.27)

2. Use N (6.84, 1.55) and the z score formula and Table A

a. What percent less than 8

b. What percent more than 5

c. What percent between 3 and 7

d. What percent less than 4 or more than 9