Flashcards in Statistics Deck (10):
Describes data and quantifies relationships between variables.
An arrangement of data points based on how frequently they occur.
A frequency distribution with a symmetrical bell shaped curve.
Measures of the center of the frequency distribution. There are three types:
1. Mode: the most frequent data point
2. Median: the middle data point
3. Mean: the arithmetic average of data points
How the data are dispersed or spread around the mean.
The distance between the highest and lowest data point.
The average distance of a data point from the mean. A small SD means the scores are relatively close to the mean score; large SD means the scores have a wider range around the mean.
Means that the differences observed are too big to have occurred by chance.
Type I error
Occur in significant testing: false positive; perceives an effect that is not there.