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Psychology (1,877)
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Chapter

# Appendix B PS101.docx

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School
Wilfrid Laurier University
Department
Psychology
Course
PS101
Professor
Carolyn Ensley
Semester
Fall

Description
PS101 Appendix B – Statistical Methods Week 3 -Statistics is the use of mathematics to organize, summarize, and interpret numerical data -Frequency distribution – an orderly arrangement of scores indicating the frequency of each score or group of scores -A histogram, is a bar graph that presents data from a frequency distribution -The frequency polygon is a line figure used to present data from a frequency distribution -Descriptive statistics organizes and summarizes data -In a negatively skewed distribution, most score pile up at the high end of the scale -In a positively skewed distribution, scores pile up at the low end of the scale -Variability refers to how much the scores tend to vary or depart from the mean score -The standard deviation is an index of the amount of variability in a set of data -The normal distribution i
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