3.1 Outliers

Question 1

What is an outlier?

Answer 1

» Extreme value that lies outside the overall pattern of the data

Question 2

What is a common way of denoting an outlier?

Answer 2

» If its greater than the uppquartile + 1.5 IQR
» Lower than the lower quaritle - 1.5 IQR

Question 3

What is cleaning the data?

Answer 3

» Process of removing anomalies from a data set

Question 4

Why are anomalies produced?

Answer 4

» Can be the result of experimental or recording error or could be data values which are not relevant to the investigation