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 Tables Words to Know • 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
Price $
Tally
Frequency
1-25
4
26-50
11
51-75
7
76-100
13
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
6
30 - 39
9
40 - 49
3
50 - 59
2
Example Music
• • • • •
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 C= country F= top 40
J= jazz P= rap
Tally
Frequency
Rock
5
Jazz
2
Country
2
Top 40
8
Rap
8
Example – Your Turn Rentals
• • • • •
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
Tally
Frequency
Example – Your Turn Breakfast 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
Tally
Frequency