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WorksheetsUnderstanding IQR and Outliers
Total questions: 7
Worksheet time: 4mins
What is the formula for IQR (Interquartile Range)?
Q3 + Q1
Q3 – Q1
(Q3 × Q1)/2
Q3 ÷ Q1
Given the data: 4, 5, 7, 8, 9, 10, 12, 13, 15, 50 What is the IQR?
9
6
7
12
How do you detect Outliers using IQR?
Values smaller than Q1 – 1.5×IQR or larger than Q3 + 1.5×IQR
Values smaller than Q1 + IQR
Values larger than Q3 + IQR only
All values are Outliers
In the same dataset: 4, 5, 7, 8, 9, 10, 12, 13, 15, 50 Is 50 considered an Outlier?
Yes
No
Cannot tell
What does the Box Plot show?
Only the Mean
Only the Minimum and Maximum
The Median, Q1, Q3, and possible Outliers
The Mode only
In a Box Plot, the line inside the box represents:
The Mean
The Mode
The Median
The Maximum
If a Box Plot shows many points outside the Whiskers, what does that mean?
There are no Outliers
The data is normally distributed
There are multiple Outliers
The data is constant
