Eng102 - 5 Number + Summary o Min=Q(1) Q(1)=1 st quartile...

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25/01/2010 16:13:00 Finding the measure of center Mean = Average o = x ex. 1, 3,3,4,5,8 x  = (1+3+3+4+5+8)/6 x  =  4 o Use x if data is symmetric Median = Q^2 o = Middle number ex. 1,3,3,4,5,8 median = (3+4)/2 = 3.5 o median is robust, so therefore you should use it if there are outliers or  data is skewed Mode = value repeated the most Finding the measure of spread Range = Max-Min o Represents the average distance points are from x Ex. 8-1 =  7 o Variance (s^2) and standard deviation (S) o Use for spread if you used x as center
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Unformatted text preview: 5 Number + Summary o Min=Q(1) Q(1)=1 st quartile or lowest 25% of data o Med=Q(2) Q(2) = 2 nd quartile or 50% of data o Q(3)= 3 rd Quartile or lowest 75%/highest 25% o Max= o Ex.1 1,3,3,4,5,8 Min=1 Q1=3 Med=3.5 Q3=5 Max=8 o Ex. 2 11, 12, 13, 14, 15, 16, 16, 19, 21, 22, 26, 27, 32, 41, 45, 50, 53 Min= 11 Q1= 14.5 Med= 21 Q3= 36.5 Max= 53 25/01/2010 16:13:00 25/01/2010 16:13:00...
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This note was uploaded on 11/02/2010 for the course ENGL 102 taught by Professor Cramer during the Spring '08 term at Santa Monica.

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Eng102 - 5 Number + Summary o Min=Q(1) Q(1)=1 st quartile...

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