| A | B |
|---|
| population | the total group from which a sample is drawn |
| frequency distribution | arranging data so you know how often a score occurs |
| scatterplot | graph that demonstrates the direction of the relationship between two variables |
| random sample | provides an equal chance of being represented in a study |
| stratified sample | representative of various subgroups of the population |
| correlation | the relationship between two sets of variables or data |
| correlation coefficient | a statistic that describes the direction and strength of the relationship between two sets of variables or data |
| normal curve | a symmetrical bell-shaped curve |
| descriptive statistics | the listing and summarizing of data in a practical way |
| survey | method of collecting data through interviews and questionnaires |
| standard deviation | a measure of variability that describes the average distance of every score from the mean of the scores |
| experimental group | a group of participants to whom an independent variable is applied |
