15.7. Linear Correlation http://www.ck12.org
yˆ= 52. 4069 + 1. 7745 x
Wherexrepresents shoe size and ˆyrepresents predicted height. The predicted height for someone with size 9 shoe
is 68.3774:
yˆ= 52. 4069 + 1. 7745 · 9 = 68. 3774
An easy way to use the power of the calculator is to use function notation from the home screen:
Concept Problem Revisited
Enter the data onto lists in your calculator:
Turn the [STAT PLOT] on that compares the two lists of data:
You should note that the data is extremely linear with a positive correlation coefficient: