Averages (Edexcel GCSE Statistics): Flashcards
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Practise the cards
10 cards from this deck
What is the purpose of an average in statistics?
What is the purpose of an average in statistics?
To find a single number representing the whole data set
What is the mode in a data set?
What is the mode in a data set?
The most frequently occurring value
How do you find the mode in a dataset?
How do you find the mode in a dataset?
Count appearances of each value, most frequent is mode
When is there no mode in a data set?
When is there no mode in a data set?
No value repeats in the data set
What is the median in a data set?
What is the median in a data set?
The middle value when data is ordered
How do you find the median for an odd number of values?
How do you find the median for an odd number of values?
Arrange in order, find the middle value
How do you find the median for an even number of values?
How do you find the median for an even number of values?
Arrange in order, average the two middle values
What is the formula for the mean?
What is the formula for the mean?
Sum of values divided by number of values
How do you calculate the mean?
How do you calculate the mean?
Add all values, then divide by the count
When should you use the median?
When should you use the median?
When data has extreme outliers or skewed