1. Lesson 12-4 Pages 623-628 Histograms

2. What you will learn! 1. How to display data in a histogram. 2. How to interpret data in a histogram.

3. Histogram

4. What you really need to know! A histogram uses bars to display data that have been organized into equal intervals. It is a special type of bar graph.

5. What you really need to know! 1.There is no space between bars. 2.All bars have the same width.

7. Example 1: The frequency table shows the number of overseas visitors to certain U.S. cities in 1999. Display the data in a histogram.

8. 65 4 3 2 1 0 0 - 1,000 1,001 - 2,000 2,001 - 3,000 3,001 - 4,000 4,001 - 5,000 5,001 - 6,000 Number of U.S. Cities Number of Visitors

9. Example 2: Use the histogram. How many states have highest points with elevations at least 3,751 meters? 12

10. Example 2: Use the histogram. Is it possible to tell the height of the tallest point? NO! You can only tell it is between 5,001 and 6,250 meters.

11. Example 3: Use the histograms. Which business sector has more states between 1,001,000 and 3,000,000 employees? Services!

12. Page 625 Guided Practice #’s 3-10

15. Pages 623-624 with someone at home and study examples! Read:

16. Homework: Pages 626-628 #’s 12, 14, 15-19 #’s 27-28, 32-35 Lesson Check 12-4

21. Page 753 Lesson 12-4