1 of 11

Slide Notes

DownloadGo Live

Outliers: Finding Extreme Values

Published on Nov 19, 2015

How to find outliers using the 1.5 times IQR definition. Includes a sample data set.

View Outline

MORE DECKS TO EXPLORE

PRESENTATION OUTLINE

1.

OUTLIERS

FINDING EXTREME VALUES IN YOUR DATA SET
Photo by Robert S. Donovan
2.

FIND OUTLIERS

USING THE (1.5)(IQR) DEFINITION
Photo by digitalbodies
3.

FIND THE 5-NUMBER SUMMARY

MINIMUM, Q1, MEDIAN, Q3, MAXIMUM
4.

OR USE YOUR CALCULTOR

STAT, MATH, 1-VAR STATS
Photo by Will Elwood
5.

OK, YOU DON'T REALLY NEED THE MIN AND THE MAX.

BUT IT'S GOOD PRACTICE.
Photo by renaissancechambara
6.

FIND THE INTERQUARTILE RANGE (IQR)

Q3 - Q1
7.

FIND THE LOWER BOUNDARY

(Q1) - (1.5)(IQR)
8.

OUTLIERS

ANY VALUES LOWER THAN THE LOWER BOUNDARY
Photo by ταηjεεr
9.

FIND THE UPPER BOUNDARY

(Q3) + (1.5)(IQR)
10.

OUTLIERS

ANY VALUE HIGHER THAN THE UPPER BOUNDARY
Photo by Sharon Drummond
11.

487 IS AN OUTLIER

IT IS HIGHER THEN THE UPPER BOUNDARY OF 268.75

Kathy Harrison

mrsharrisonmath.weebly.com