Study Guide and Intervention (continued) - MathnMind
Study Guide and Intervention (continued) - MathnMind
Study Guide and Intervention (continued) - MathnMind
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13-4<br />
NAME ______________________________________________ DATE ____________ PERIOD _____<br />
<strong>Study</strong> <strong>Guide</strong> <strong>and</strong> <strong>Intervention</strong><br />
Measures of Variation<br />
Range A measure of variation called the range describes the spread of numbers in a set<br />
of data. The range of a set of data is the difference between the highest <strong>and</strong> the lowest value.<br />
Example 1<br />
The number of wins for the baseball teams<br />
of the American League Central Division are shown at<br />
the right. Find the range of the number of wins.<br />
The greatest number of wins is 95 <strong>and</strong> the least number of<br />
wins is 69: 95 69 26.<br />
The range is 26.<br />
Source: cbs.sportsline.com<br />
Example 2<br />
Find the range of the student grades below.<br />
58, 95, 72, 85, 84, 88, 91, 92, 93, 45, 80, 81, 92, 93, 50, 79, 84<br />
Since the highest score is 95 <strong>and</strong> the lowest score is 45, the range is 95 45 or 50.<br />
Exercises<br />
Find the range of each set of data.<br />
1. Month Days Below 32F<br />
2.<br />
November 5<br />
December 20<br />
January 21<br />
February 15<br />
March 8<br />
3. 4, 5, 5, 4, 4, 6, 5, 5 4. 1, 7, 12, 10<br />
5. 3, 0, 4, 9, 6, 4, 0, 1 6. 1.5, 0.5, 2, 3, 2.5<br />
7. Stem | 8.<br />
Leaf<br />
1 | 234678<br />
2 | 1556789<br />
3 | 0023 1⏐2 12<br />
Stem | Leaf<br />
18 | 3467<br />
19 | 004<br />
20 | 122388<br />
21 | 347 18⏐3 183<br />
9. RACING In five pre-race trials, a stock car driver recorded the following speeds in miles<br />
per hour: 155, 158, 163, 187, 172. Find the range.<br />
10. SWIMMING The swimming times in seconds for the 50-yard butterfly were<br />
36.30, 35.00, 31.60, 34.00, 35.52, 36.39, 38.87, <strong>and</strong> 41.62. Find the range.<br />
© Glencoe/McGraw-Hill 799 Glencoe Algebra 1<br />
0<br />
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1<br />
2<br />
3<br />
4<br />
5<br />
6<br />
Major League Final<br />
St<strong>and</strong>ings, 2000<br />
7<br />
Team Wins<br />
Chicago White Sox 95<br />
Clevel<strong>and</strong> Indians 90<br />
Detroit Tigers 79<br />
Kansas City Royals 77<br />
Minnesota Twins 69<br />
Lesson 13-4
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