Lesson 12-4 Pages 623-628

Histograms

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

2. How to interpret data in a histogram.

HistograHistogramm

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.

What you really need to know!

1.There is no space between bars.

2.All bars have the same width.

Example 1:

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

66

55

44

33

22

11

000 0

--1,001,00

00

1,001,001-1-

2,002,0000

2,002,001-1-

3,003,0000

3,003,001- 1-

4,004,0000

4,004,001- 1-

5,005,0000

5,005,001- 1-

6,006,0000

Num

ber

of U

.S. C

itie

s

Number of Visitors

Example 2: Use the histogram.

How many states have highest points with elevations at least 3,751 meters?

12

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.

Example 3: Use the histograms.

Which business sector has more states between 1,001,000 and 3,000,000 employees?

Services!

Page 625

Guided Practice

#’s 3-10

Pages 623-624 with someone at home and

study examples!

Read:

Homework: Pages 626-628

#’s 12, 14, 15-19

#’s 27-28, 32-35

Lesson Check 12-4

Page

753

Lesson 12-4