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Appendices > Appendix B: Answers to Selected Problems
Appendix B: Answers to Selected Problems
Sections 2.1 and 2.2
3. (a) All the students of the graduation class. (b) All the students in the professor's class. (c) GPA.
5. (a) Ratio (b) Ratio (c) Ratio (d) Nominal (e) Ratio (f) Ordinal (g) Ratio (h) Ratio (i) Interval (j) Ratio (k) Ratio (l) Ratio (m) Ordinal (n) Nominal
Section 2.3
3. (b) (1, 2, 3, 4, 5) ~ (24%, 24%, 16%, 22%, 14%) (c) 48%
Section 2.4
3. The line graph does not show any particular pattern.
5. The stem-and-leaf diagram with increment 5 is more informative.
9. (b) On 13 of 31 days, 36 or more patients were treated.
Section 2.5
1. (a) = 120.02, Med = 120.10, no mode. (b) 1.84 (c) approximately symmetric.
3. (a) = 22.356, Med = 23.00 (b) 4.73 (c) 100%
5. (a) = 108.47, Med = 107.50, mode = 100 (b) Range = 20, Var. = 50.10, S = 7.08, CV = 6.53 7. 3.75238 9. (51,100, 60,100), (46,600, 64,600) 11. (a)
= 22.650, S = 1.461 (b) (21.189, 24.111), (19.728, 25.572), (18.267, 27.033) (c) 100%, 100%, Chebychev's Inequality is valid.