📚

All Subjects

 > 

📊 

AP Stats

 > 

🔎

Unit 3

3.6 Selecting an Experimental Design

1 min readjune 3, 2020

Aly Moosa


Selecting the proper experimental design depends on the situation presented and the experimental units given. You need to be able to identify when it is appropriate to utilize a certain type of experiment. Make sure you understand the differences between the types of experiments and how to create the treatment groups randomly.

Essential Knowledge

While completely randomized designs are the simplest statistical designs for experiments, there are times when the simplest method for yielding precise results is not completely randomized. There are three main designs that you can use after selecting a sample for your experiment. Don't mix up language of experiment and the language of sample surveys!

Key Terms:

    • Completely Randomized Design - Experimental units are randomly assigned to treatments equally by chance.
    • Blocking Design - Sort groups of individuals that are known to be similar in some way that can expect different results. Do not randomize those groups together. USE ALL BLOCKS in a blocked experiment.
    • Matched Pairs Design - A common type of block for comparing two treatments with similar individuals or identical treatment methods.

Was this guide helpful?

🔍 Are you ready for college apps?
Take this quiz and find out!
Start Quiz
FREE AP stats Survival Pack + Cram Chart PDF
Sign up now for instant access to 2 amazing downloads to help you get a 5
Browse Study Guides By Unit
📆
Big Reviews: Finals & Exam Prep
✏️
Blogs
✍️
Free Response Questions (FRQs)
👆
Unit 1: Exploring One-Variable Data
✌️
Unit 2: Exploring Two-Variable Data
🎲
Unit 4: Probability, Random Variables, and Probability Distributions
📊
Unit 5: Sampling Distributions
⚖️
Unit 6: Inference for Categorical Data: Proportions
😼
Unit 7: Inference for Qualitative Data: Means
✳️
Unit 8: Inference for Categorical Data: Chi-Square
📈
Unit 9: Inference for Quantitative Data: Slopes
Join us on Discord
Thousands of students are studying with us for the AP Statistics exam.
join now
Play this on HyperTyper
Practice your typing skills while reading Selecting an Experimental Design
Start Game
💪🏽 Are you ready for the Stats exam?
Take this quiz for a progress check on what you’ve learned this year and get a personalized study plan to grab that 5!
START QUIZ
Hours Logo
Studying with Hours = the ultimate focus mode
Start a free study session
📱 Stressed or struggling and need to talk to someone?
Talk to a trained counselor for free. It's 100% anonymous.
Text FIVEABLE to 741741 to get started.
© 2021 Fiveable, Inc.