Cumulative frequency diagrams 2 (AQA GCSE Statistics): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
What does a cumulative frequency diagram show?
What does a cumulative frequency diagram show?
It shows the running total of frequencies up to each point.
How to find the number of items above a value?
How to find the number of items above a value?
Count items above the value in the data set.
What is the first step to find a value from cumulative frequency?
What is the first step to find a value from cumulative frequency?
Draw a horizontal line from the cumulative frequency value.
What is typically shown on the horizontal axis of a graph?
What is typically shown on the horizontal axis of a graph?
It usually represents the independent variable or categories.
How do you find the percentage of items above a value?
How do you find the percentage of items above a value?
Subtract the cumulative percentage from 100%.
What is a step polygon in cumulative frequency?
What is a step polygon in cumulative frequency?
It's a graph with straight lines connecting points.
Why is accuracy important in cumulative frequency?
Why is accuracy important in cumulative frequency?
Small inaccuracies can lead to incorrect answers.
How do you read values from a cumulative frequency graph?
How do you read values from a cumulative frequency graph?
Use vertical and horizontal lines systematically.
What should you use to draw lines on the graph?
What should you use to draw lines on the graph?
Always use a ruler and sharp pencil for accuracy.
How do you create a cumulative frequency table?
How do you create a cumulative frequency table?
Add frequencies cumulatively for each data interval.