# Saltire Software

## Common Core Nuggets :: Statistics

This collection contains apps that will help teachers implement the Common Core Statistics Standard S-ID 6a, b, c for High School Mathematics.

#### Residual Basics

This app allows you to experiment with a movable line on a given data set to find the placement with the smallest possible magnitude for the sum of the residuals. (S-ID 6b)

#### Least Squares

By showing the residuals and/or the residual squares, experiment with a movable line to minimize the sum of the residual squares. This app helps develop an intuitive feel for the process of fitting a line to data, specifically the Least Squares Regression Line. (S-ID 6c)

#### Least Squares II

This app continues with the ideas of minimizing the squared residuals, but allows you to compare the result to the actual regression line. Students can continue to experiment by randomly generating new data for extra reinforcement. (S-ID 6c)

#### Residual Plots

This app is an introduction to the idea of residual plots which help interpret the accuracy of a line of fit by making the pattern in the residuals easier to see. An apparently linear data set is used to show how important the residual plot is. (S-ID 6b)

#### Residual Plots II

This app helps illustrate how the residual plot relates to the proper choice of a function to fit a particular data set. Students should learn to look for a random, scattered pattern to the location of the residuals, rather than a predictable curve shape. (S-ID 6a)

Apps created with Geometry Expressions