A212­4Notes.notebook
September 21, 2010
Algebra 2
Ch.12 Notes Pages 25
P25 12­4 Standard Deviations
Aug 19­6:20 AM
Analyzing Data
Background:
Mean (Average)
Median (Number in the Middle)
Mode (Most Frequent)
Box and Whisker Plots
Sep 20­3:05 PM
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A212­4Notes.notebook
September 21, 2010
Box and Whisker Plots
Lower Extreme
Lower Quartile Q1
Median Q2
Upper Quartile Q3
Upper Extreme
(Min)
(Med. of Lower Half)
(Med.)
(Med. of Upper Half)
(Max)
2,3,3,4,5,6,8,9
Sep 20­3:04 PM
Standard Deviations
Measures of Variation
3,4,5,6,7,7,8,9,9,10,11,12,14,16,18
Range ­ Difference Between the Highest and Lowest Value
18 ­ 3 = 15
Interquartile Range ­ Difference Between Quartile 3 and Quartile 1
12 ­ 6 = 6
Jan 20­8:25 AM
2
A212­4Notes.notebook
September 21, 2010
Standard Deviation
Measures how much values in a data set vary, or Deviate, from the mean...
Jan 20­8:25 AM
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Sep 14­7:04 AM
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