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lecture_341_day4
Course: MATH 341, Fall 2009School: Wisc La Crosse
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341 January Math 25, 2007 Measures of Center Descriptive Statistics {2.5, 3.2, 3.2, 3.4, 3.6, 3.7, 3.9, 3.9, 4, 4.2, 4.2} Mean average Practice Hospital length of stay sample size, n=21 Median middle value Mode most frequent occurring value. Length of Stay 5 3 4 28 1 5 1 7 18 24 6 6 15 2 9 13 10 9 9 12 13 {1, 1, 2, 3, 4, 5, 5, 6, 6, 7, 9, 9, 9, 10, 12, 13, 13, 15, 18, 24, 28} Consider 3...
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341
January Math 25, 2007
Measures of Center
Descriptive Statistics
{2.5, 3.2, 3.2, 3.4, 3.6, 3.7, 3.9, 3.9, 4, 4.2, 4.2}
Mean average
Practice Hospital length of stay sample size, n=21
Median middle value Mode most frequent occurring value.
Length of Stay
5 3 4 28 1 5 1 7 18 24 6 6 15 2 9 13 10 9 9 12 13
{1, 1, 2, 3, 4, 5, 5, 6, 6, 7, 9, 9, 9, 10, 12, 13, 13, 15, 18, 24, 28}
Consider 3 samples
Section 1.4
Measures of Dispersion (Spread)
{1,2,5,5,8,9} {3,4,5,5,6,7} {5,5,5,5,5,5}
Range Variance Standard Deviation summary
Xnew Fivenumber = a + bX
Linear Transformation
Effect of Linear Transformation
Multiplying each observation by b multiplies both measures of center (mean and median) and measures of spread by b. Adding the same number a to each observation adds a to measures of center and quartiles but does not change ...
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