1. A study in which researchers measure or observe characteristics of the sample members
Representative sample
Observational study
Double-blind study
Unimodal
2. Any problem in study design that tends to favor certain results
Statistics
Sample
Bias
Representative sample
Population parameter
3. Science of collecting, organizing, and interpreting data
Statistics
Population
Sample
Population parameter
4. The most common value in a distribution
Qualitative data
Quantitative data
Mean
Mode
Median
5. A single number commonly used to describe the variation in a data distribution
Statistics
Population parameter
Mean
Mode
Median
Standard deviation