Calculating Correlation Coefficient and Regression Line with TI-Nspire

What is the first step in using the Nspire to calculate the correlation coefficient?

• Choose statistical calculations

• Press the menu button

• Enter data into a list and spreadsheet page

• Scroll down to linear regression

Which menu option should you select to access statistical calculations?

• Choice number 2

• Choice number 3

• Choice number 4

• Choice number 1

What does choice #3 (mx + b) represent in the linear regression options?

• Slope times y-value plus b

• Intercept times y-value plus m

• Slope times x-value plus b

• Intercept times x-value plus m

Where do you save the regression equation in the Nspire?

• Function 1

• Function 2

• Column D

• Column C

What is the correlation coefficient denoted by in the results?

• r

• b

• R-squared

• m

What is the value of the correlation coefficient in the example provided?

• 0.018182

• 6

• 0.0859

• 1

What does the R-squared value represent?

• Intercept of the regression line

• Coefficient of determination

• Slope of the regression line

• Correlation coefficient

What is the equation of the regression line in the example?

• y = 6x + 0.0859

• y = 6x + 0.018182

• y = 0.018182x + 6

• y = 0.0859x + 6

What should you do to see the regression line on a scatter plot?

• Click menu and choose statistics

• Click menu and choose graph

• Click menu and choose analyze

• Click menu and choose data

What is the final step to display the linear regression line on the scatter plot?

• Choose show exponential regression

• Choose show polynomial regression

• Choose show quadratic regression

• Choose show linear regression