data
COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING AS PRENTICE HALL
Ch. 2-
Mean
Median
Mode
Describing Data Numerically
Variance
Standard Deviation
Coefficient of Variation
Range
Interquartile Range
Central Tendency
Variation
Quartile
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COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING AS PRENTICE HALL
Ch. 2-
Mean
Median
Mode
Describing Data Numerically
Variance
Standard Deviation
Coefficient of Variation
Range
Interquartile Range
Central Tendency
Variation
Quartile
Sample Ranked Data: 6 7 8 9 10 11 11 12 13 14
COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING AS PRENTICE HALL
Ch. 2-
COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING AS PRENTICE HALL
Ch. 2-
12 30 45 57 70
The plot can be oriented horizontally or vertically
Ch. 2-
Small spread/variation
Large spread/variation
COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING AS PRENTICE HALL
Ch. 2-
2/22/2017
2/22/2017
2/22/2017
Where:
= population mean
N = population size
xi = ith value of the variable x
Where:
= arithmetic mean
n = sample size
Xi = ith value of the variable X
COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING AS PRENTICE HALL
Ch. 2-
COPYRIGHT © 2013 PEARSON EDUCATION, INC. PUBLISHING AS PRENTICE HALL
Ch. 2-
n = 8 Mean = x = 16
A measure of the “average” distance about the mean