frequency table
DESCRIPTION
ÂTRANSCRIPT
Conceptualization:
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