Measures of Spread (HSC SSCE Mathematics Standard): Flashcards
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Range formula
Range formula
Highest score - Lowest score
Main limitation of range
Main limitation of range
Heavily influenced by extreme values/outliers
What do quartiles divide data into?
What do quartiles divide data into?
Four equal parts
(First quartile) meaning
(First quartile) meaning
Value below which 25% of data falls
(Third quartile) meaning
(Third quartile) meaning
Value below which 75% of data falls
IQR formula
IQR formula
What does smaller IQR indicate?
What does smaller IQR indicate?
Data is more consistent/tightly clustered
Standard deviation measures what?
Standard deviation measures what?
How much data values vary from the mean
When to use sample standard deviation?
When to use sample standard deviation?
When you have a sample from a larger population
Sample standard deviation divides by
Sample standard deviation divides by
(one less than number of values)