1. Data, Data, Data

2. Data is information, facts, or numbers which describe something.
Data, Data, Data
What is data?
Data is information, facts, or numbers which describe something.

3. Data, Data, Data
Types of Data
1. Categorical Data
2. Numerical Data

4. Data, Data, Data
Categorical Data
Data which have been grouped into categories, such as colors, types of music, favorite stores, etc. You might use a “What is your favorite ___ ?” question for this type of data.

5. Data, Data, Data
Numerical Data
Data which counts or measures, such as number of pets, test score, height, etc. You might use a “How many ____?” type question for this type of data.

6. Data, Data, Data Categorical Categorical Numerical Categorical
Read each of the questions below and identify which are categorical and which are numerical. Categorical questions have words or categories as answers, and Numerical questions have numbers as answers.
Categorical
In which season were you born?
What is your favorite kind of pet?
How many pets do you have?
Who is your favorite actress?
How much time do you spend watching television in a day?
What’s your highest score in the game?
How many movies have you watched in the past week?
Categorical
Numerical
Categorical
Numerical
Numerical
Numerical

7. Number of Fingerprint Patterns
Data, Data, Data
Ways To Represent Data
Used when
collecting data
Number of Fingerprint Patterns
Whorl
Arch
Loop 7 4 5
l l l l l l l l l l l l l l
Frequency Table

8. Frequency Table Characteristics
Includes a title
Can be used to collect either numerical OR categorical data
Remember to have a column or row for tally marks and one for the frequency (the total number of tally marks)

9. times each value occurs
Data, Data, Data
Ways To Represent Data
Student Scores
Used to show number of
times each value occurs
X X X
X X X X X
X X X X X X
X X X X X X X
X X X X X X X X
Line Plot

10. Line Plot Characteristics
Includes a title
Uses a number line (so there are arrows on the ends)
Uses x’s to show the count
Be sure to use an equally spaced scale
Used to collect NUMERICAL data only

11. amounts of similar things
Data, Data, Data
Ways To Represent Data
Used to compare
amounts of similar things
Bar Graph

12. Bar Graph Characteristics
Includes a title
Be sure both axes are labeled using an equally space scale (the x-axis is horizontal   & the y-axis if vertical)
Bars can be vertical or horizontal
Space between bars
Bars are equal width
We’ll use a bar graph to display categorical data

13. Ways To Represent Data Pictograph Data, Data, Data Uses symbols to
Lunch Line
Uses symbols to
compare data
Line
Number of Students A B C
Key
= 10 students
Pictograph

14. Pictograph Characteristics
Includes a title
Includes a key to show how much each picture/symbol represents
Can be vertical or horizontal
Pictographs represent categorical data

15. Ways To Represent Data Line Graph Data, Data, Data Used to show change
in data over time
Line Graph

16. Line Graph Characteristics
Includes a title
Both axes need to be labeled (use an equally spaced scale)
Uses line segments to connect data points
Used to show numerical data

17. Ways To Represent Data Stem-and Leaf Plot Data, Data, Data
Organizes data from
least to greatest
Ways To Represent Data
Test Scores
Stem Leaves 6 7 8
Stem-and Leaf Plot

18. Stem-and-Leaf Characteristics
Includes a title
Includes a key to show how to read a stem-and-leaf plot
Be sure numbers are ordered least-to-greatest
The digits in the ones place are the leaves in your plot

19. Ways To Represent Data Histogram Data, Data, Data Used to show
continuous data
Histogram

20. Histogram Characteristics
Includes a title
Both axes must be labeled
Uses intervals of numbers (for example:
1 – 3, 4 – 6, 7 – 9, etc.)
Bars touch one another because the data is continuous in a histogram
Used to show numerical data