Statistical Measures (Edexcel A-Level Mathematics): Flashcards
📚Flashcards
Practise the cards
14 cards from this deck
ShowHide
Practise the cards
14 cards from this deck
Purpose of frequency tables
Purpose of frequency tables
Organise & summarise data, show how often values appear
What frequency column shows
What frequency column shows
Number of times each value/interval occurs
What cumulative frequency helps identify
What cumulative frequency helps identify
Medians and quartiles
How relative frequency is expressed
How relative frequency is expressed
As a percentage of total frequency
Step 2 of constructing frequency table
Step 2 of constructing frequency table
Determine the range (find min & max values)
Class intervals for continuous data
Class intervals for continuous data
Divide range into equal intervals
How to calculate cumulative frequency
How to calculate cumulative frequency
Add each frequency to sum of previous frequencies
How to calculate relative frequency
How to calculate relative frequency
Divide frequency by total, multiply by for %
Mode in frequency table
Mode in frequency table
Value/interval with highest frequency
Finding median in discrete data (freq. table)
Finding median in discrete data (freq. table)
Locate middle value(s) in cumulative frequency column
Advantage of frequency tables
Advantage of frequency tables
Clear summary of large datasets, easier to see patterns
Measures frequency tables help calculate
Measures frequency tables help calculate
Central tendency, dispersion, & graphical representations
Discrete vs continuous data in freq. table
Discrete vs continuous data in freq. table
Discrete: distinct values; Continuous: ranges/intervals
Cumulative frequency definition
Cumulative frequency definition
Running total of frequencies up to each value/interval