M119L07to08-page1 - (Lesson 7 Measures of Relative Standing...

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(Lesson 7: Measures of Relative Standing or Position; 3-4) 3.30 LESSON 7: MEASURES OF RELATIVE STANDING OR POSITION (SECTION 3-4) How high or low is a data value relative to the others? We want standardized measures that will work for practically all populations involving quantitative data. PART A: z SCORES z = x ± mean SD Idea: ² new mean = 0 ² new SD = 1 ³ ´ µ · ¸ We are transforming the original data set of x -values into a new data set of z -values. x 1 x 2 x 3 etc. ±±± z 1 z 2 z 3 etc. Subtracting off the mean from all of the original x -values recenters the data
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This note was uploaded on 12/29/2011 for the course MATH 119 taught by Professor Kim during the Fall '09 term at SUNY Stony Brook.

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