ch3measuresofvariability

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Unformatted text preview: µ ____|________|_______|___|_______|__________|____ ____|________|_______|___|_______|__________|____ 6.7 9.2 12.4 12.8 15.2 20.5 6.7 The deviations are as follows: The µ ____|________|_______|___|_______|__________| ____ 6.7 9.2 12.4 12.8 15.2 20.5 6.7 x 6.7 9.2 12.4 15.2 20.5 total d i = ( xi − µ ) = ( xi − 12.8) -6.1 -3.6 -0.4 +2.4 +7.7 N d ∑ i= 1 i = 0 Note: The sum of the deviations is ALWAYS zero. These deviations may be large, may be small, may be positive, may be negative. We are naturally interested in the “average.” However, Average deviation = N Average ∑d i =1 N i = 2.4 − 3.6 − 6.1 − 0.4 + 7.7 0 = =0 5 5 The source of troubl...
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This note was uploaded on 03/02/2013 for the course STAT 0301 taught by Professor Gabriell during the Spring '09 term at HKU.

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