graphing
Post on 06-Jan-2016
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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
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