1. Chapter 3
Data Description
Section 3-2
Measures of Central Tendency

2. Section 3-2 Exercise #3

3. MD:
1, 2, 3, 3, 7, 11, 18, 30, 61
MD: 7

5. Section 3-2 Exercise #5 Find (a) the mean, (b) the median,
(c) the mode, and (d) the midrange.

6. (c) No data are repeated.
No mode.
(d) Arrange data in increasing order.
(b) Arrange data in increasing order:
median

7. It seems that the average number
of identity thefts is higher than 300.

8. Section 3-2 Exercise #17 5 107.5-118.5 14 96.5-107.5 18 85.5-96.5 25 12 6
Frequency
Class Boundaries

9. Boundaries
52.5 – 63.5
348 6 58
63.5 – 74.5
828 12 69
74.5 – 85.5
2000 25 80
85.5 – 96.5
1638 18 91
96.5 – 107.5
1428 14
102
107.5 – 118.5
565 5
113
6807 80

10. modal class: 74.5 – 85.5