PSY 2106 Study Guide - Midterm Guide: Central Tendency, Scatter Plot, Type I And Type Ii Errors

• School: University of Ottawa
• Department: Psychology
• Course: PSY 2106
• Professor: Veronika Huta

Document Summary

Stats i midterm #2 review (includes lectures 8 13) Z scores are standard scores and they are the number of scores above/below the mean from the location of a raw score. Find the distance between the mean and one standard deviation (sd) and then you can double it to find 2 sds, triple it to find 3 sds, etc. Z=1 is one sd above the mean; z=-1 is one sd below the mean; z=-1. 4 is 1. 4 sds below the mean, et cetera. Converting raw scores to standard scores is called standardization. Z-scores are used for the following: knowing how far above or below a raw score is from the mean. comparing scores from different scales. combining scores from different scales. finding the percentage above or below a raw score. How converting z-scores affects statistics: the conversion to z-scores does not affect the shape of a frequency distribution.