Step 1) In order for the graphing calculator to be able to calculate the correlation coefficient. You must change a setting in the calculator. Press "2nd" then "CATALOG" (above the zero button in most TI Calculators)
Step 2) Scroll down to the "D" area (this catalog list is alphabetical) and stop when you are at "DiaGnosticOn".Press "Enter"
Step 3) You should see "DiaGnosticOn" displayed on the main calculator screen
Step 4) Press "enter"
Now, your calculator is actually prepared to calculate the correlation coefficient. Our next task is to enter the data into the lists of the calculator.
Step 1) Press "Stat"
Step 2) Hit "enter" button and you should see the three lists on the right. In the next step we will enter all of the scores into L1
Step 3) Enter the women's shoe size into list 1 and the the foot length into list 2.
Step 5) Press "Stat" again
Step 6) Scroll Right to "Calc"
Step 7) Scroll down to "LinReg"
Step 8) Press "enter". Your calculator screen should look like the screen shot on the right