Bar Graphs and Bar Graphs and HistogramsHistograms

SWBAT make double bar graphs; interpret SWBAT make double bar graphs; interpret double bar graphs; make/use frequency table double bar graphs; make/use frequency table in preparation for constructing a histogram; in preparation for constructing a histogram;

make and use a histogrammake and use a histogram

DefinitionsDefinitions

Double bar graph Double bar graph Compares two related sets of dataCompares two related sets of data

HistogramHistogram A graph that shows the frequency of equal A graph that shows the frequency of equal

intervals of dataintervals of data

To create a bar graphTo create a bar graph

Draw a Draw a verticalvertical and a and a horizontalhorizontal axes on axes on grid papergrid paper

Choose an appropriate Choose an appropriate scalescale for both sets for both sets of dataof data

LabelLabel both axes. both axes.

Choose Choose colorscolors and create a and create a keykey

Draw a Draw a barbar for each value of the data for each value of the data

Write a Write a titletitle for the graph for the graph

ExamplesExamples

Create a bar graph for the following dataCreate a bar graph for the following data

Favorite T-Shirt ColorsFavorite T-Shirt Colors

ColorColor GirlsGirls BoysBoys

WhiteWhite 44 77

RedRed 88 88

BlueBlue 1212 88

GreenGreen 1111 66

YellowYellow 77 1111

ExamplesExamples

What T-shirt colors are favored by more What T-shirt colors are favored by more boys than girls?boys than girls?

What T-shirt colors are favored the same What T-shirt colors are favored the same by boys and girls?by boys and girls?

ExamplesExamples

Create a bar graph for the following dataCreate a bar graph for the following data

Swimsuit SalesSwimsuit Sales

MonthMonth Two-pieceTwo-piece One-pieceOne-piece

AprilApril $2,400$2,400 $2,100$2,100

MayMay $3,200 $3,200 $4,600$4,600

JuneJune $5,600$5,600 $5,800$5,800

JulyJuly $5,900$5,900 $6,000$6,000

AugustAugust $5,100$5,100 $4,800$4,800

ExamplesExamples

When was the total sale of two-piece and When was the total sale of two-piece and one-piece swimsuits the greatest?one-piece swimsuits the greatest?

When was the total sales the least?When was the total sales the least?

Create a Frequency table and a Create a Frequency table and a Histogram Histogram

Weight of Kennel Dogs (lbs)Weight of Kennel Dogs (lbs)37 63 40 77 44 56 35 18 33 24 29 37 63 40 77 44 56 35 18 33 24 29

31 26 58 65 72 75 60 31 42 6031 26 58 65 72 75 60 31 42 60