Box Plots

Question 1

What numbers are needed in a box plot

Answer 1

Lowest value 
Lower quartile 
Median
Upper quartile
Highest value

Question 2

How do you work out an outlier?

Answer 2

For above the highest value

1.5 x IQR + UQ

For below the lowest value

1.5 x IQR - LQ

Question 3

How do you calculate the IQR

Answer 3

You do the UQ - LQ

Question 4

How do you work out the LQ and UQ

Answer 4

LQ = half way from the median to the lowest value

UQ = half way from the median to the highest value

Question 5

What should you write about when talking about comparing box plots

Answer 5

Skew
IQR
Median
Range