Statistics Unit Study Guide

Front

What does 'skewed left' mean in statistics?

Back

A distribution is skewed left when the left tail (lower values) is longer or fatter than the right tail, indicating that most data points are concentrated on the right.

Front

What is the interquartile range (IQR)?

Back

The interquartile range is the difference between the first quartile (Q1) and the third quartile (Q3) in a data set, representing the range of the middle 50% of the data.

Front

If Q1 is 5 and Q3 is 15, what is the interquartile range?

Back

10 (IQR = Q3 - Q1 = 15 - 5)