Sociology 2205A/B Lecture Notes - Lecture 6: Standard Score, Standard Deviation, Normal Distribution
28 Sep 2016
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Mode, median and mean are all the same value o. In the real world they are slightly different. Distances on horizontal axis always cut off the same area. The formula changes a raw score (xi) to a standard deviation or z-score. The mean of all z-scores is 0. Appendix a: back of textbook o o o o. Column b = areas between the mean and the z-score. Column c = area beyond the z score. How to find area below a positive z-score o. Person height = 73 inches: mean = 68 inches. Standard deviation = 3 o o: his height is 1. 67 standard deviations above the mean. To find the area below a positive score you just add column b area to 0. 5. To find an area above a positive score look at column c. How to find area below a negative z-score o. Person height = 63 inches: mean = 68 inches.
