LibraryPirate

ANSWERS TO ODD-NUMBERED EXERCISES A-117
Frequency
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
1 2 3 4 5 6 7 8 9
Number of Substances Used
4.2.3. x = 1.58, s 2 = 2.15, s = 1.47
4.3.1. (a) .1484 (b) .8915 (c) .1085 (d) .8080
4.3.3. (a) .2536, (b) .3461 (c) .7330 (d) .9067 (e) .0008
4.3.5. mean = 4.8, variance = 3.264
4.3.7. (a) .5314 (b) .3740 (c) .0946 (d) .9931 (e) .0946
(f) .0069
4.3.9.
Number of
Successes, x
0
1
2
3
Probability, f(x)
3!
0! 3! 1.223 1.82 0 = .008
3!
1! 2! 1.222 1.82 1 = .096
3!
2! 1! 1.221 1.82 2 = .384
3!
3! 0! 1.220 1.82 3 = .512
Total 1
4.4.1. (a) .156 (b) .215 (c) .629 (d) .320
4.4.3. (a) .105 (b) .032 (c) .007 (d) .440
4.4.5. (a) .086 (b) .946 (c) .463 (d) .664 (e) .026
4.6.1. .4236
4.6.3. .2912
4.6.5. .0099
4.6.7. .95
4.6.9. .901
4.6.11. -2.54
4.6.13. 1.77
4.6.15. 1.32