# Activities

• • • ##### Subject Area

• Math: Statistics: Inferential Statistics

• ##### Author College

60 Minutes

• TI-86
• ##### Other Materials
This is Activity 9 from the EXPLORATIONS Book: Using the TI-86 in Collegiate Mathematics: A Tutorial

## Statistics

#### Activity Overview

In this activity, students use the statistical features of the calculator to calculate statistical results, perform regressional analyses, and graphically display statistical data.

#### Before the Activity

• Set up the calculator as explained in the activity
• See the attached PDF file for detailed instructions for this activity
• Print pages 121 - 146 from the attached activity PDF file for the class
• #### During the Activity

Distribute the pages to the class.

• Enter listed data into the calculator directly from the home screen, or by using the list editor
• Plot a histogram for the entered data
• Compute the summary statistics for one variable data
• Edit lists using the List Editor
• Use the sum command to compute summary statistics

• Enter two-variable statistical data, and graph a scatter plot and an xyLine plot
• Compute the summary statistics for two variable data
• Understand how to recall summary statistics
• Sort the data in ascending order
• Find the Least Squares Regression line for the data, and determine its equation
• Store the line in the graphing editor

• Predict a y-value for a given x-value (and vice versa) using the regression curve
• Use the Forecast option to compute the predicted value

• Study various regression models which can be performed by the calculator
• Perform a Power regression on a bivariate data
• Graph the scatter diagram, the linear regression curve, and the power regression curve in the same viewing window
• Compare the two regression curves
• Using the Sum command, compute the values for the sum of the squares of the differences
• Select the best regression model based on the SSD values

• Determine the correlation between the data
• Examine the Cumulative Distribution Programs
• #### After the Activity

Students complete the exercises on the Activity sheet.

Review student results:

• As a class, discuss questions that appeared to be more challenging
• Re-teach concepts as necessary