Measures of Dispersion (AQA A-Level Geography): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What do measures of dispersion reveal about a dataset?
What do measures of dispersion reveal about a dataset?
How spread out data values are
Which three are the main measures of dispersion?
Which three are the main measures of dispersion?
Range, IQR, standard deviation
How is range calculated?
How is range calculated?
Highest value - Lowest value
What is a key limitation of using range?
What is a key limitation of using range?
It only uses two values from the dataset
What portion of data does the inter-quartile range (IQR) focus on?
What portion of data does the inter-quartile range (IQR) focus on?
The middle 50%
What is the formula for calculating IQR?
What is the formula for calculating IQR?
UQ - LQ
Why is standard deviation more powerful than range or IQR?
Why is standard deviation more powerful than range or IQR?
It uses every single value in the dataset
What is the relationship between variance and standard deviation?
What is the relationship between variance and standard deviation?
SD is the square root of variance
In a normal distribution, what % of values fall within 1 standard deviation of the mean?
In a normal distribution, what % of values fall within 1 standard deviation of the mean?
Approximately 68%
What does a low standard deviation indicate?
What does a low standard deviation indicate?
Data is clustered closely around the mean