AS ONLY
L4: Outliers & Cleaning Data

From the DfE Mathematics AS and A-Level Content (LINK):

Outliers and Cleaning Data

L4-01 [Outliers: Using the Quartiles and Interquartile Range]

L4-02 [Outliers: Using the Mean and Standard Deviation]

L4-03 [Data: Critiquing Data Example]

L4-04 [Data: Cleaning Data Example]