Data Analysis Choosing the Appropriate Graph 6th Grade Math

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Presentation transcript:

Data Analysis Choosing the Appropriate Graph 6th Grade Math Georgia Performance Standards: M6D1c: Choose appropriate graphs to be consistent with the nature of the data (categorical or numerical). Graphs should include: pictographs, histograms, bar graphs, line graphs, circle graphs, and line plots.

Essential Question Can you pick the correct graph to use when given certain information?

Choosing Appropriate Graphs Pictograph – Visual display of data ***Key Features: Must use a symbol to represent data items “Eye Catching”

Choosing Appropriate Graphs… Bar Graph - categorical data “categories” Type of Fish Swimming Speed Carp 6 Cod 8 Mackerel 11 Pike A Legend tells you what each bar represent.

Choosing Appropriate Graphs… Line Graph – change over a period of time

Choosing Appropriate Graphs… Histogram – a special type of bar graph that displays intervals or ranges Key Features: Ranges and Bars connect

Choosing Appropriate Graphs… Circle Graph – displays percents or fractional parts

Choosing Appropriate Graphs… Stem-and-leaf Plot – lists numerical data in order from least to greatest ex) Ordered Plot Line Plot – shows data above number line displayed with “X’s” (outliers and mode easily identified)

What type of graph? 2. 3. The ages of 16 school teachers are: 4. A car dealership sells seven makes of cars. Which data display(s) could be used to compare sales for each make of car last year? 2. 3. The ages of 16 school teachers are: 48, 52, 46, 58, 25, 48, 55, 51, 58, 49, 60, 53, 30, 27, 42, 49 Postage Stamp Rate Year 1992 1994 1996 1998 2000 2002 2004 U.S. Letter Rate (cents per oz.) 29 32 34 37 40 4.

What type of graph would you use to display this information? Would you use a bar graph or a stem-and-leaf plot to display the ages of 30 people buying a movie ticket? Explain. How is the graph misleading? 6. Recreation football sign-ups are complete. The following number of boys registered in each age group are listed below: 7 to 8 year olds - 48 boys 9 to 10 year olds – 73 boys 11 to 12 year olds – 68 boys What type of graph would you use to display this information?