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Module 2: Descriptive Statistics (Dispersion (Range (Review possible data…
Module 2: Descriptive Statistics
Dispersion
Range
Susceptible to outliers
Review possible data misentry
Could have used different units by accident (ft vs. inches)
Interquartile Range (IQR)
Variance
Standard Deviation
Visualizing Data
frequency means count (the actual number)
Relative frequency is a proportion or percentage
Pie Charts operate on relative frequency
Bar charts are good for visualizing categorical data
Bar chart is different from a Histogram :!?:
5 Number Summary
Median formula: n + 1 / 2
Median not included in either quartile data (slide 12, class 4 notes)
Box Plots
Quartiles. Q1 & Q3
Extreme values: minmalist & maximist
Sum of Squares is different from Variance (look at formulas)