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Published byErnest Hart Modified over 8 years ago
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Psychology’s Statistics Psychology’s Statistics Appendix (page A1 - A13)
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Statistics purpose: make data more meaningful provide a method of organizing information so that it can be understood
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Frequency Distribution list of scores placed in order from highest to lowest
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Three Main Types of Statistics Descriptive Statistics Comparative Statistics Inferential Statistics
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Descriptive Statistics
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used to describe the basic features of the data in a study 2 Main Types: Measures of Central Tendency Measures of Variation
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Measures of Central Tendency statistical methods for finding the center of a distribution three methods: Mode - most frequently occurring score Mean - average of a distribution Median - middle score in a ranked distribution
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Measures of Variation variation – how spread-out scores are Example: range - difference between the highest and the lowest scores in a distribution
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Inferential Statistics Inferential Statistics
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Inferential Statistics can be used to make a decision or reach a conclusion about data correlations:
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Statistical Significance statement of how likely it is that a result occurred by chance For something to be statistically significant, the possibility that the difference between groups would occur by chance alone is not more than ____ % 5
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END CLASS NOTES
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Favorite Subject Survey (& Statistics) Working with your group, create a 5 question survey to determine views on the subjects taught at North Cobb High School. Answers to your survey questions should be a range from 0 – 5 with 0 representing HATE the subject and 5 representing LOVE the subject. Administer the survey to 3 students in the class
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Favorite Subject Survey (& Statistics) Now analyze your data: Make a frequency distribution for each of the five subjects. Compute the mean, median, & mode for each of the five subjects. Compute the range for each subject.
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