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