Education Technology

Exploring “What’s Typical?” Using Sampling and Design

Technology: TI-84 Plus family, TI-Nspire™ Technology
Speakers: Diane Broberg, Jeff McCalla

Many statistical investigations revolve around the question, “What’s typical?”

But “typical” depends on how much variability is in the system. Well-chosen data collection procedures can help manage variability; good design is crucial. GIGO – Garbage In, Garbage Out.

Presenters will:

  • Examine the two main types of inference and the main obstacle each must overcome (bias and confounding)
  • Demonstrate why random sampling and random allocation are kinds of “insurance”
  • Use activities to illustrate when, how and why more complex data-collection procedures such as stratification and blocking may be beneficial
  • Show good data-collection procedures using visual, technology-based activities and AP* questions

Both TI-84 Plus and TI-Nspire™ technology will be used.

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*AP is a registered trademark of the College Entrance Examination Board. ACT is a registered trademark of ACT, Inc. Neither are affiliated with, nor endorse, TI products.