# Common Core and Inference with TinkerPlots

Dec 13, 2011

Watch a recording of this webinar.

### Description

Why is there variation between different random samples from a population? This is one of the many questions that are addressed in the Common Core State Standards for Grade 7. Our discussion will include a demonstration of how to add a population’s data into the Sampler Engine in order to draw out random samples.

Common Core State Standards covered in this webinar include:

• 7.SP.1. Understand that statistics can be used to gain information about a population by examining a sample of the population; generalizations about a population from a sample are valid only if the sample is representative of that population. Understand that random sampling tends to produce representative samples and support valid inferences.
• 7.SP.2. Use data from a random sample to draw inferences about a population with an unknown characteristic of interest. Generate multiple samples (or simulated samples) of the same size to gauge the variation in estimates or predictions.
• 7.SP.4. Use measures of center and measures of variability for numerical data from random samples to draw informal comparative inferences about two populations.

## Angela Greene

Angela Greene has taught junior and senior high school mathematics for 5 years. She has served as department chair and school technology assistant. Prior to teaching, she was a manager of employee benefits and payroll for 15 years. She is currently a consultant and Lead Trainer for K12 Action Math.

## Kathryn Shafer

Kathryn Shafer began teaching middle school and high school mathematics in 1984 and is currently an Assistant Professor in the Department of Mathematical Sciences at Ball State University, Indiana. Kathy began using TinkerPlots in 2009 when she received a Creative Teaching Award to integrate technology into mathematics coursework for pre-service teachers. She has worked as a consultant for Key Curriculum since 2007 as a moderator and trainer for Fathom, The Geometer's Sketchpad, and TinkerPlots professional development.