Graphing

Data• Tables are a neat and organized way to collect data• Graphs allow you to easily show the data in a way

that people can draw conclusions easily. • There are several types of graphs:

– Pie charts: These show data in terms of a percentage– Line graphs: These show data over time– Bar graphs: These compare one group of data to another

• Statistics are mathematical tests that can tell us useful things about data– Example: the mean, median, mode– Standard Deviation: the mean of the mean

How to calculate average

• Average: add up all the numbers from a column and divide by how many numbers there are

How to make a bar graph

• Bar graphs compare groups of different items.

How to make a bar graph

How to make a pie chart• Pie charts are graphs showing

PARTS of a WHOLE. – Ex. 36 Hershey’s were collected.

120 total candies were collected. Hershey’s are 36/120

How to make a pie graph

• You and your friends visit various houses to collect candy. The amount of candy you collected at each time is shown in the table below. Make a line graph showing the candy you collected that evening. Which time is it best to go out collecting candy?

Time Candy

7 56

8 107

9 32

10 6

How to make a line graph