2/8/2021

Demo - Google Drive, R, and RStudio for Mac - William Yanek

Random Rectangles Activity - see handout

• Open R script GoogleDrive\Stat106-S2021\!ClassMaterial\RandomRectangle.R
• Where is the distribution of guesses centered?
• Where is the distribution of your judgement samples of 5 rectangles centered?
• Where is the distribution of the simple random samples of 5 rectangles centered?
• Where is the distbituion of the simple random samples of 10 rectangles centered?
• Use the R commands in RandomRectangle.R to investigate what happens when the sample size increases from 5 or 10 to 20 and 40.

The Importance of Randomization

Different types of Bias

Major Statistical Concepts from Section 1.4 Reading

• Treatment versus Control Group
• Placebo and Placebo Effect
• Double-blind Experiment

Step-by-Step Process for Planning an Experiment

• Identify your objective.
• Decide what information to collect.
• Decide how to collect the information.
• Decide how many experimental units are needed.
• Use randomization to assign experimental units to treatments.
• Collect the data.
• Analyze the data.

Gummi Bear Experiments

Please read Section 2.1 for class on Wednesday