Misleading Graphs and StemandLeaf Plots 32 Example 1

Misleading Graphs and Stem-and-Leaf Plots #32

Example 1: Misleading Bar Graphs Why is this bar graph misleading?

Example 2: Misleading Bar Graphs What might people believe from the misleading graph? 1 __ 2

Example 3 Dollars Money Raised 600 580 570 560 550 540 530 4 th graders 5 th graders 6 th graders Why is this bar graph misleading?

Example 4 Dollars Money Raised 590 580 570 560 550 540 530 4 th graders 5 th graders 6 th graders What might people believe from the misleading graph?

Example 5: Misleading Line Graphs Why are these graphs misleading?

Example 6: Misleading Line Graphs What might people believe from these misleading graphs?

Example 7: Misleading Line Graphs Why is this line graph misleading?

September Week Temperature (°F) Example 8 November Why are these graphs misleading? Week

Price of stock ($) Example 10 Stock prices 80 Corp. C Corp. D 70 60 50 0 1985 1990 1995 2000 Year Why is this line graph misleading?

VOCABULARY A stem-and-leaf plot shows data arranged by place value. You can use a stem-and-leaf plot when you want to display data in an organized way that allows you to see each value.

Example 11: Creating Stem-and-Leaf Plots Use the data in the table to make a stem-andleaf plot. 75 88 Test Scores 86 83 91 84 99 79 94 86

Helpful Hint To write 42 in a stem-and-leaf plot, write each digit in a separate column. 4 2 Stem Leaf

Example 12 Use the data in the table to make a stem-andleaf plot. 72 84 Test Scores 88 64 79 83 76 74 61 67

Example 13: Reading Stem-and-Leaf Plots Find the least value, greatest value, mean, median, mode, and range of the data. The least stem and least leaf Stems give the least value, 40. 4 The greatest stem and 5 greatest leaf give the 6 greatest value, 94. 7 8 9 Leaves 00157 1124 333599 044 367 14 Key: 4 0 means 40