January 23, 2008

January 23, 2008 - VI. Mode A. “Computation” B....

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January 23 Outline I. Graphing on SPSS II. Intro. to Chapter 4—Central Tendency and Variability III. Arithmetic mean A. Equation N X X = N X = μ B. Properties 1. Sum of deviations equals 0 2. Sensitive to exact value of all scores 3. Sensitive to extreme scores 4. Sum of squared deviations is a minimum 5. Least subject to sampling variation IV. Overall mean k k k overall n n n X n X n X n X + + + + + + = ... ... 2 1 2 2 1 1 V. Median A. Computation B. Properties
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1. Less sensitive than mean to extreme scores 2. More subject than mean to sampling variation
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Unformatted text preview: VI. Mode A. “Computation” B. Properties 1. Not sensitive to extreme scores 2. Most subject to sampling variation VII. Central tendency and symmetry Mean: the point in a distribution about which the sum of the deviations equals 0 Deviation score: how far a raw score is from the mean of the distribution (X – μ ) Median: the scale value below which 50% of the scores in a distribution fall Mode: the most frequent score in a distribution...
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This note was uploaded on 04/17/2008 for the course PSYC 241 taught by Professor Jamesantes during the Spring '08 term at North Dakota.

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January 23, 2008 - VI. Mode A. “Computation” B....

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