IQR REVIEW

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is the difference between the upper quartile (Q3) and the lower quartile (Q1) of a data set.

Front

How do you calculate the IQR?

Back

IQR = Q3 - Q1, where Q3 is the upper quartile and Q1 is the lower quartile.

Front

What does Q1 represent in a data set?

Back

Q1, or the first quartile, represents the value below which 25% of the data falls.

Front

What does Q2 represent in a data set?

Back

Q2, or the median, represents the middle value of a data set, dividing it into two equal halves.

Front

What does Q3 represent in a data set?

Back

Q3, or the third quartile, represents the value below which 75% of the data falls.

Front

What is the range of a data set?

Back

The range is the difference between the maximum and minimum values in a data set.

Front

How do you find the median of a data set?

Back

To find the median, arrange the data in ascending order and locate the middle value.

Front

What is the purpose of using quartiles in data analysis?

Back

Quartiles help to understand the distribution of data by dividing it into four equal parts.

Front

What is a dot plot?

Back

A dot plot is a simple way to display data using dots to represent individual data points.

Front

How do you identify outliers in a data set?

Back

Outliers can be identified using the IQR method: any value below Q1 - 1.5*IQR or above Q3 + 1.5*IQR is considered an outlier.