Exam 1 Review

Here are some things to focus on for exam 1. This is not meant to be a comprehensive list. It is merely trying to help you focus on some important things to study.

1. Definitions

Definitions are a huge part of this exam. Be sure to understand them, not just memorize them. Some definitions to know:

• Population versus Sample (can you identify the sample/population?)
  
  
• Experiment versus Observation study (How can you tell? Be sure to know! Experiment = treatments applied, observational study = just looking at something that has already happened)
  
  
• A control / comparison
  
  
• Replication (be careful with this one!)
  
  
• Explanatory Variable versus Response Variable (explanatory = treatments, response = a measurable thing on the individual)

2. Randomization

This is a huge part of all your tests. KNOW the randomized designs and how to recognize them.

• Know the difference between RANDOMIZED SAMPLING and RANDOMIZED DESIGNS.
  
  
• Randomized Sampling includes: SRS (Simple Random Sample), Stratified Sampling, and Multi-Stage Sampling
  
  
• Randomized Experimental Designs: CRD (completely randomized design), Block Design and Matched Pairs.
  
  
• Realize that if it's an experiment, we care more about the randomized experimental design than the sampling design.

3. Graphing

• Know what types of graphs are categorical and quantitative (and which ones we like and how to recognize them)
  
  
• Five number summary. How to find it, how to recognize it on a blox plot. (The percentage between Q1 and Q3 is....)
  
  
• Shape, Center and Spread of a graph. (Shape: Skewed right/left etc, Center: mean/median and when to use them, and Spread: IQR and St. Deviation. Know things about both.)

4 . Z-Scores!

• Check my post below for a comprehensive review on z-score equation problems.
  

Remember, many things are concept base, so make sure you understand why, not just how.

Good Luck!
-Hillary