Statistic Definitions

Statistic Definitions

1. Descriptive statistics: Methods of organizing and presenting data in a informative way.

2. Inferential statistics: The methods used to determine something about a population on the basis of a sample.

3. SAMPLE - A small part intended to show what the whole is like.

4. With replacement: A member of the population may be chosen more that one time

5. Without replacement: A member of the population that can be chosen only one time

6. Random (Each member of the population has a chance of being selected)

7. nonrandom (when the population doesn't have an equal chance for being selected

   • A constant: has a fixed numerical value

8. stratified sample- technique wherein the researcher divides the entire population into different subgroups then they select randomly.

   • A variable is an item of interest that can take on many different numerical values.

9. Qualitative- Data are measurements that each fail into one of several categories.

10. Quantitative- Data observations that are measured on a numerical scale.