# PSYCH 2300

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 Author: xx.chelsii ID: 222226 Filename: PSYCH 2300 Updated: 2013-06-03 17:07:18 Tags: Chapter Folders: Description: Central Tendency Show Answers:

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1. Central Tendency
• Is a statistical measure to determine a single score that defines the center of a distribution.
• Goal: to find a score that is best representative of a entire group
2. Population Mean
Greek letter "mu"
3. Mean for sample
Is identified by M or X (read x-bar)
4. Mean
For a distribution is the sum of the scores divided by the number of scores
5. Weighted Mean
• Combining two sets of scores
6. Median
• If the scores in a distribution are listed in order from smallest to largest, the median is the midpoint of the list
• Represented by the word median
7. Mode
In a frequency distribution, the mode is the score that has the greatest frequency
8. Bimodal
A distribution with two modes
9. Multimodal
Distribution with two or more modes
10. Major/minor Mode
When two modes have unequal frequencies, researchers occasionally differentiate the two values by calling the taller peak the major mode, and the shorter one the minor mode
11. Line graph
• Point connected with a straight line.
• Line graph is used when the values on the horizontal axis are measured on an interval or ratio scale
12. Symmetrical Distribution
• Right hand side of the graph is a mirror image of the left side
13. Positively skewed
14. Negatively Skewed
15. Skewed Distribution
A distribution that is skewed either + or -

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