Warm Up

1. A bar graph uses ____________________ to represent data.

2. True or false: A circle graph shows how data changes.

3. Draw a graph that represents a flag being raised up a flagpole slowly at the beginning and quickly at the end.

4. Solve .

Lesson 27: Identifying Misleading Representations of Data

Statistics and Probability

•When displaying data, components such as labels or scale can make graphs misleading.• The size of increments in the scale can also make a graph misleading.

Example

• This bar graph shows the houses prices for 2 consecutive years. Explain why it might be misleading.

Example

• Here is the same graph with a revised scale. Is the graph less misleading now?

Example

• Explain why the line graph is misleading.

This graph appeared on FOX News. Why is it misleading? What do you suppose is the purpose for this graph? How would we fix it?

Graph courtesy of http://www.statisticshowto.com/misleading-graphs/

Homework Questions

Correcting Homework

• Be kind

• Hold questions until the end

• Return the paper to its owner if there are more than 3 empty squares.

• Be sure to write “C.B. _____________” with your name.

Homework

• 1st and 2nd hour: Lesson 27 #1-30

• 3rd hour: Lesson 27 #1-15