Algebra 1 - MathnMind

13-4
NAME ______________________________________________ DATE ____________ PERIOD _____
Practice
Measures of Variation
Find the range, median, lower quartile, upper quartile, and interquartile range of
each set of data. Identify any outliers.
1. 73, 39, 58, 42, 71, 84, 27, 23, 36, 57, 70, 52, 35, 51, 29, 38
2. 42.1, 37.3, 20.0, 45.1, 39.3, 32.0, 38.1, 33.2
3. Stem | 4.
Leaf
8 | 016
9 | 35
10 | 0
11 | 11589
12 | 34
13 |
14 | 147 14⏐4 144
FARMING For Exercises 5–9, use the table below.
Hired Farm Workers October 8–14, 2000 (thousands)
Region Number Region Number Region Number
Northeast I 50 Lake 71 Mountain I 34
Northeast II 45 Cornbelt I 56 Mountain II 24
Appalachian I 40 Cornbelt II 31 Mountain III 21
Appalachian II 33 Delta 42 Pacific 78
Southeast 33 Northern Plains 33 California 24
Florida 50 Southern Plains 61 Hawaii 8
Source: USDA-NASS Agricultural Statistics
5. What is the range in the number of workers hired?
6. What is the median number of workers hired?
7. What are the lower quartile and the upper quartile
of the data?
8. What is the interquartile range of the data?
9. Name any outliers.
ASTRONOMY For Exercises 10–14, use the stem-and-leaf plot
that gives the absolute magnitudes of notable comets. Source: NASA
10. What is the range in magnitudes?
11. What is the median magnitude?
12. What are the lower quartile and the upper
quartile of the data?
13. What is the interquartile range of the data?
14. Name any outliers.
Stem | Leaf
0 | 45
1 | 137
2 | 07
3 |
4 | 1459
5 | 223
6 | 01 0⏐4 0.4
Stem | Leaf
5 | 5
6 | 5
7 |
8 | 5
9 | 00008
10 | 6
11 | 79
12 | 0015
13 | 5 8⏐5 8.5
© Glencoe/McGraw-Hill 802 Glencoe Algebra 1