Central Tendency Flashcards
It is a statistical measure to determine a single score that defines the center of a distribution.
Central Tendency
It is the sum of the scores divided by the number of scores.
Mean
2 alternative definitions of Mean
- Dividing the Total Equally
- The Mean as a Balance Point
It is the calculated overall mean when one makes a larger contribution to the total group and therefore carries more weight.
Weighted Mean
4 Characteristics of the Mean
- Changing a Score
- Introducing a New Score or Removing a Score
- Adding or Subtracting a Constant from Each Score
- Multiplying or Dividing Each Score by a Constant
The midpoint of the list if the scores in a distribution are listed in order from smallest to largest and if the point on the measurement scale below which 50% of the scores in the distribution are located.
Median
The score or category that has the greatest frequency in a frequency distribution.
Mode
A distribution with two modes.
Bimodal
A distribution with two or more modes.
Multimodal
The taller peak of frequency mode.
Major Mode
The shorter peak of frequency mode.
Minor Mode
4 situation to use Median
- Extreme Scores or Skewed Distributions
- Undetermined Values
- Open-Ended Distributions
- Ordinal Scale
3 situations to use Mode
- Nominal Scale
- Discrete Variables
- Describing Shape
2 general types of distributions
- Symmetrical Distribution
- Skewed Distribution
It is where the right-hand side of the graph is a mirror image of the left-hand side.
Symmetrical Distribution
