Ch 4 Graphs Main topic-How can you appropriately display data.

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Presentation transcript:

Ch 4 Graphs Main topic-How can you appropriately display data

4.1 Categorical variables Key Q-How do you construct and read graphs?

Categorical Variables (Categories, classes, topics, intervals) Categories may be numerical or not. Education -Less than HS grad. -HS grad. -Some secondary education. -Secondary degree. -Advanced degree. House Size to 2500sqft to 4000sqft to 6000sqft

Frequency Tables Mr. Booth’s grades (in percent) Rules for quantitative frequency tables 1.Interval should be the same size. 2.No skipping intervals. 3.No overlapping. 4.*Make them nice.*

Blue8 Green3 Red7 Yellow10 Black3 Other14 Favorite Color Miles traveled during the summer. (in miles)

Pie Chart (Circle Chart) Used to compare a whole on one topic. Needed to construct a pie chart. 1.Percents 2.Degrees

Blue8 Green3 Red7 Yellow10 Black3 Other14 Favorite Color

Bar Graph Strictly categorical variables.

Classes are not connected. Show this by not connecting the bars.

Line Charts Best graph for showing change over time.

Trend A pattern of increase or decrease. Big picture view point.

Seasonal Trend A pattern that occurs every year.

Rules for all graphs 1. Must have labels, a title, and a key or legend. 2. Data must standout.