Calculating the Correlation Coefficient on a TI-84

This video tutorial guides students on how to calculate the correlation coefficient using a TI-84 calculator. It covers entering data into lists, attempting the calculation without diagnostics, enabling diagnostics, and finally obtaining the correct correlation coefficient between high school and college GPA.

What is the first step in calculating the correlation coefficient on a TI-84 calculator?

• Selecting the linear regression function

• Turning on diagnostics

• Entering data into lists

• Calculating the mean

Which lists should the explanatory and response variables be entered into for consistency?

• l1 and l2

• l2 and l1

• l3 and l4

• l4 and l3

After entering the data, which function should be selected to calculate the linear regression?

• linreg c + dx

• linreg b + ax

• linreg a + bx

• linreg d + cx

What should you do if the correlation coefficient does not appear after selecting the linear regression function?

• Change the lists

• Re-enter the data

• Turn on diagnostics

• Restart the calculator

How do you turn on diagnostics on the TI-84 calculator?

• Go to the catalog and select 'Diagnostics On'

• Press the 'Diagnostics' button

• Restart the calculator

• Enter a special code

What is the correlation coefficient between high school GPA and college GPA in the example?

• 0.789

• 0.916

• 0.689

• 0.816

To how many decimal places is it typical to round the correlation coefficient?

• Three or four

• Two or three

• Four or five

• One or two