Stats - Outliers

Pearson Edexcel Mathematics 2022

Created: November 03, 2020 | Read markdown | About these notes | View in context | Study these flashcards |

Outliers and anomalies

What is an outlier?

outlier-definition

An extreme value.

What is an outlier which is not correct called?

anomaly-definition

An anomaly.

What is the process of removing anomalies called?

cleaning-the-data-definition

Cleaning the data.

Much-less-than and much-greater-than symbols

What does $\ll$ mean?

much-less-than-symbol

Much less than.

What does $\gg$ mean?

much-greater-than-symbol

Much greater than.

Identifying and plotting outliers

What is the typical definition of an outlier?

outlier-iqr-rule

Any value that is over $1.5$ the interquartile range away from the upper or lower quartile.

Should you add an outlier to a box plot?

outlier-on-box-plot

Yes.

Where are the two places a “whisker” should go after you’ve removed an outlier?

whisker-placement-after-outlier
  • At the next acceptable value.
  • At the outlier boundary.


Related posts