STA 291 Spring 2010. Lecture 5 Dustin Lueker. Measures of Central Tendency. Mean - Arithmetic Average . Median - Midpoint of the observations when they are arranged in increasing order. Notation: Subscripted variables n = # of units in the sample N = # of units in the population
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STA 291Spring 2010
Lecture 5
Dustin Lueker
Mean - Arithmetic Average
Median - Midpoint of the observations when they are arranged in increasing order
Notation: Subscripted variables
n = # of units in the sample
N = # of units in the population
x = Variable to be measured
xi= Measurement of the ith unit
Mode - Most frequent value.
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
Or N if you are finding the population variance
(To get the standard deviation, take the square root of the result)
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
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STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5
STA 291 Spring 2010 Lecture 5