Quadratic Regression Concepts

This video tutorial explains how to perform quadratic regression using the TI-84 Plus CE graphing calculator. It begins with an introduction to quadratic regression, comparing it to linear regression. The tutorial then guides viewers through entering x and y values into the calculator, setting up the graph, and ensuring the plot is visible. It details the process of calculating quadratic regression and interpreting the results, including graphing the quadratic equation and understanding the coefficient of determination.

What is the primary focus of this video tutorial?

• Linear regression using TI-84 Plus CE

• Quadratic regression using TI-84 Plus CE

• Cubic regression using TI-84 Plus CE

• Statistical analysis using TI-84 Plus CE

What is the first step in setting up the calculator for quadratic regression?

• Entering the y values

• Clearing previous data

• Adjusting the window settings

• Turning on the calculator

Which list is used to enter x values in the calculator?

• L4

• L1

• L3

• L2

What should you do if your scatter plot does not appear?

• Check if the calculator is on

• Ensure the plot is turned on

• Re-enter the data

• Reset the calculator

What are the recommended x and y max values for the window settings?

• x max 50, y max 25

• x max 100, y max 50

• x max 75, y max 35

• x max 60, y max 30

Which menu option is used to calculate quadratic regression?

• Window

• Calculate

• Graph

• Edit

What is the coefficient of determination also known as?

• T score

• R squared

• P value

• Z score

What is the general form of the quadratic equation derived from the regression?

• y = a + bx

• y = ax^3 + bx^2 + cx + d

• y = ax^2 + bx + c

• y = ax + b

What feature can be used to find the maximum of the parabola?

• Zoom

• Trace

• Graph

• Calculate