statchap3

# statchap3 - Section 3.1 The 3 M's : Mean, Median, and Mode...

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1 Section 3.1 The 3 M’s : Mean, Median, and Mode Average Middle Most frequent # total of data values On TI-83 a) enter data b) calc. 1-Var. Stats scroll down for Med = x mean median = Median: Even # of data values : 30 n = 15 values 15 values 2 values in the middle : The 15 th and the 16 th Take the average of these two values In our data set : the 15 th # is 17 and the 16 th value is 18 17 18 Median = 17.5 2 + =

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2 Median: Odd # of data values : 31 n = 15 values 15 values 1 value in the middle : the 16 th value the median is that 16 th value How is the mean, median, and mode affected by increasing the maximum value by 100? Mean increases Median stays same Mode stays same (if the mode isn’t the max)
How is the mean, median, and mode affected by increasing every value by 5? Mean increases by 5 Median increases by 5 Mode increases by 5 How is the mean, median, and mode affected by multiplying every value by 2? Mean increases by a factor of 2

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## This note was uploaded on 04/20/2008 for the course MAT 121 taught by Professor Rimmer during the Fall '07 term at West Chester.

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statchap3 - Section 3.1 The 3 M's : Mean, Median, and Mode...

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