Y1, C3 - Representations of Data Flashcards
1
Q
What is an outlier
A
An extreme value
2
Q
What is a common definition of an outlier
A
Any value 1.5IQRs beyond the upper and lower quartiles
3
Q
When comparing box plots what 2 things should you compare
A
Measure of location (median)
Measures of spread
4
Q
How to calculate frequency density
A
Frequency / class width
5
Q
What type of data are histograms and bar charts for
A
Histograms - continuous data
Bar charts - discrete date
6
Q
Formula for the area of a bar on a histogram
A
area = frequency x k
Where k is a scaling constant
7
Q
How is a frequency polygon drawn
A
Find the midpoint of each interval of a histogram and connect the dots
8
Q
What months are included in the large data set
A
May - October
