Lesson 6: Scatterplots

September 17, 2018

Review:

• Exam 1 Results
• Exam 1 Solutions
• Court of Appeals

Presentation:

• Scatterplots
  • Relationship between 2 variables
    • independent (x) and dependent (y)
    • explanatory (x) and response (y)
    • horizontal axis (x) and vertical axis (y)
  •  Examples
    • Ice Cream Sales
    • Colorado TCAP Scores and % Free-Reduced Lunch
    • Gender Wage Gap
  • Alternative Uses
    • Predicted vs Actual
  • Video
  • Demonstrate scatterplot construction with Ice Cream Sales data in Sheets

Activity:

• Exercises 2.6 and 2.7 on p. 95
• How strong is the relationship between the score on the first test and the score on the final exam?
  • Which variable should be used as the independent/explanatory (x) variable?
  • Make a scatterplot and describe the relationship.

First Test	Final Exam
153	145
144	140
162	145
149	170
127	145
118	175
158	170
153	160

• How strong is the relationship between the score on the second test and the score on the final exam?
  • Which variable should be used as the independent/explanatory (x) variable?
  • Make a scatterplot and describe the relationship.

Second Test	Final Exam
158	145
162	140
144	145
162	170
136	145
158	175
175	170
153	160

Assignment:

• Use Fertility-GDP data to make a scatterplot in Sheets
• Text Ch. 2, pp. 83-92