Measures of Location and Spread (Leaving Cert Mathematics): Flashcards

A single representative value for a whole dataset

Mode, median, and mean

Value appearing most frequently in a dataset

Middle value when data arranged in order

Sum of all values divided by number of values

$\frac{\text{sum of numbers}}{\text{number of numbers}}$

$\frac{1}{2}(n + 1)$

Average of the two middle values

Yes, e.g., colours or sports

Affected by unusually high or low values

Multiply each group's mean by group size

Arrange data in order of size