8/31/2016
Questions about RStudio
Methods of Collecting Data
- Census
- Sample
- Experiment
- Observational Study
- Anecdotal Evidence
The Idea Behind Sampling
- parameters versus statistics
Random Rectangles Activity - see handout
- Open R script p:\data\math\hartlaub\Elements of Statistics\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
Sampling Activity - Samples, Surveys, and Polls - see handout
Please read Sections 1.5 and 1.6 for class on Friday