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Chapter 2: Q.110 (page 156)

What is the IQR?

a.8b.11c.15d.35

Short Answer

Expert verified

IQR =25

Step by step solution

01

IQR (InterQuartile Range) 

When a data collection has outliers or extreme values, the median is used to describe a typical value rather than the mean.

02

Explanation : 

The number of years students living in California in a particular elementary statistics class. The information is given below in the table,

If the sample size is even,

Q1=n4thitem

Median, Q2=n2thitem

Q3=3n4thitemIQR=Q3-Q1

By using the formula and the data given,

Q1=15,Q3=40

IQR = 40-15=25.

Hence, IQR is 25.

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