Lecture 35
Qi Wang, Department of Statistics
Nov 15, 2017
Variance: based on the difference between each observation and the mean
Standard deviation: most commonly used for measuring how far observation are from the mean
$p_{th}$ percentile: value such that p% of the observation fall at or below it
Example: -20, 1, 23, 25, 32.5, 33, 67
Boxplot is a graphic depiction of the 5 number summary
step 1, 2, 3 are the same. BUT we indicate the outliers with a $o$ or a $\star$. Then draw the line from the ends of the box ot the highest or lowest data point that is NOT an outlier. Most software generate boxplots are modified boxplots.