1. Project Maths Development Team © 2008
Correlation Coefficient
Project Maths
Monday, April 08, 2019
Total Fat (g)
Total Calories
Hamburger 9
260
Cheeseburger 13
320
Quarter Pounder 21
420
Quarter Pounder with Cheese 30
530
Big Mac 31
560
Special
550
Special with Bacon 34
590
Crispy Chicken 25
500
Fish Fillet 28
Grilled Chicken 20
440
Grilled Chicken Light 5
300
Before doing this on the calculator, the class should do a scatter graph using the data in the table. Discuss the relationship between the data (i.e. gms of fat v calories).
Project Maths Development Team © 2008
projectmaths.ie

2. Project Maths Development Team © 2008
Correlation Coefficient by Calculator
Using the Casio fx-83ES
This will show the table on the right on the screen.
Now input all the data items into the X and Y columns. Press after each data item.
When all the data items are inputted, press the following:
This will give a correlatrion coefficient of
Compare this answer with your interpretation of the scatter graph.
Project Maths Development Team © 2008

3. Project Maths Development Team © 2008
Line of Best Fit by Calculator
Monday, April 08, 2019
Using the Casio fx-83ES
The data is already inputted to the calculator using the previous steps.
If the correlation coefficient is still on your calculator, scroll up to it using the button and delete it using the button.
Then for the value of A
And for the value of B (NB Delete the value of A before calculating the value of B)
Line of Best Fit is y = A + Bx
Project Maths Development Team © 2008
projectmaths.ie