How do we get across?

• A woman has two dogs, three rabbits and  lettuce.

• She must cross a river. • The boat is too small to carry all in one crossing. • If she transported the dogs, the rabbits would

eat the lettuce. • If she transported the lettuce, the dogs would eat

the rabbits. • Question: How is she able to transport them all

safely?

Solution

• She brings the rabbits across. Leave the rabbits and returns to get dogs. She brings the dogs across and returns with rabbits. She leaves rabbits and goes across with the lettuce. She returns to get rabbits.

Lesson 2-1

Frequency Tables

Frequency Tables

• Statistics deals with collecting, organizing, and interpreting data. Data are pieces of information, which are often numerical. Large amounts of data can be organized in a frequency table. A frequency table shows the number of pieces of data that fall within given intervals.

Frequency TablesWords to Know

Price $ Tally Frequency

1-25 4

26-50 11

51-75 7

76-100 13

• Shows the number of pieces of data that fall within given intervals.

Scale- includes the least value and greatest value

Interval- Separates the scale into equal parts

Make a frequency table

• Step 1- Choose an appropriate interval and scale. Should include the least and the greatest value.

• Step 2- Draw a table with 3 columns and label the columns.

• Step 3- Complete the table.

Example

Winning Score• 20 34 23 34 • 31 35 27 49• 30 52 37 20• 55 20 42 39• 46 38 38 27

Scores Tally Frequency

20 - 29

30 - 39

40 - 49

50 - 59

6

9

3

2

Example

Favorite Music• P R F P F • F R F P P• F P F C P• C J R R F• J R P P F• R= rock J= jazz• C= country P= rap• F= top 40

Music Tally Frequency

Rock

Jazz

Country

Top 40

5

2

2

8

Rap 8

Example – Your Turn

Movie Rentals• 10 9 2 17 12 • 9 11 10 4 14• 3 15 0 6 5• 9 20 10 11 8• 3 1 13 4 5

Rentals Tally Frequency

Example – Your Turn

Breakfast Foods• e c e p c c • c p p e c e• c e c p p e

• c= cereal• e= eggs• p=pancakes

Breakfast Tally Frequency

Homework

• Complete Lesson 2-1 # 1-7 ALL