Calculating moving averages (AQA GCSE Statistics): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
What is a moving average used for in data analysis?
What is a moving average used for in data analysis?
It smooths data to reveal underlying trends.
What is the formula for a 4-point moving average?
What is the formula for a 4-point moving average?
Sum 4 consecutive values, then divide by 4.
What is the first step in calculating moving averages?
What is the first step in calculating moving averages?
Select the number of data points for the average.
Where do you place the moving average result?
Where do you place the moving average result?
In the middle position of the values used.
What is the average of 20, 28, 42, and 17?
What is the average of 20, 28, 42, and 17?
The average is 26.75 (107/4).
What trend do moving averages help identify?
What trend do moving averages help identify?
Overall trends by reducing fluctuations.
Why use a 4-point moving average for quarterly data?
Why use a 4-point moving average for quarterly data?
It covers one complete seasonal cycle.
What is the average of 28, 42, 17, 18?
What is the average of 28, 42, 17, 18?
Average is 26.25 (sum 105, count 4).
What happens if data points are insufficient?
What happens if data points are insufficient?
You may not calculate all moving averages.
Identify the trend from averages: 270.5, 280.5, 284.
Identify the trend from averages: 270.5, 280.5, 284.
The trend is upward.