Education Technology

Activities

• Subject Area

• Math: Statistics: Sampling and Experimentation

9-12

45 Minutes

• Device
• TI-Nspire™ CX/CX II
• TI-Nspire™ CX CAS/CX II CAS
• TI-Nspire™ Navigator™
• TI-Nspire™
• TI-Nspire™ CAS
• Software

TI-Nspire™
TI-Nspire™ CAS

3.0

Stratified Sampling

Activity Overview

This lesson involves determining which of three different sampling methods - a simple random selection design and two stratified selection designs - would be most beneficial in selecting a survey sample within a given context.

Objectives

• Students will be able to identify situations in which stratification might reduce variation.
• Students will recognize that some stratification designs are useful in reducing variation and some are not.
• Students will recognize that random selection of subject(s) must occur within each stratum.
• Students will recognize that the subjects within each stratum should be as similar as possible and different from the subjects in the other strata based on a variable that has the potential to affect the outcome of the study.

Vocabulary

• random selection
• simple random sample (SRS)
• stratified random sample
• stratum(a)
• survey