What does IQR stand for and how is it calculated?
IQR stands for Interquartile Range. It's calculated by subtracting the first quartile (Q1) from the third quartile (Q3).
Why is the IQR important in statistics?
The IQR is important because it measures the spread of the middle 50% of data, helping to identify outliers.
How can I use IQR to detect outliers?
You can detect outliers by calculating 1.5 times the IQR below Q1 and above Q3. Any data points outside this range are considered outliers.
Can you give me an example of calculating IQR?
Sure! If your data set is {1, 3, 5, 7, 9}, Q1 is 3, Q3 is 7, so IQR = 7 - 3 = 4.
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