Solutions to Statistical Methods in the Biological and Health Sciences, by J. Susan Milton
Exercises 2.1
1. Personal opinion or relative frequency approach
2. Relative frequency approach. P = 150/190 = 0.79
3. Relative frequency approach. P = 5/150 = 0.033
4. Personal opinion
5. Classical approach. S = {LL, LR, RL, RR}. P = 1/4 = 0.25
6. Relative frequency. P = 1/2000 = 0.0005
7. Relative frequency. P = 8/100 = 0.08
8. Relative frequency. P = 98/140 = 0.70
9. Relative frequency. P = 1/5 = 0.20
10. Classical approach. S = {DDD, ADD, DAD, DDA, DAA, ADA, AAD, AAA}
P (all three die) = 1/8 = 0.125. P(at least one dies) = 7/8 = 0.875
11. Relative frequency approach.
a. P(within 12.5 minutes) = 0.80
b. P(within first 5.9 minutes) = 1 - 0.05 = 0.95
c. P(between 12.6 and 14.7 minutes) = 0.15
12. Relative frequency approach. P(at most 1.8%) = 17/50 = 0.34
Solutions prepared by Laura J. Simon, Pennsylvania State University