Grade 6 | Unit 8 | Lesson 15: Quartiles and Interquartile Range | Practice Problems

Front

What is a quartile?

Back

A quartile is a type of quantile that divides a data set into four equal parts, each containing 25% of the data.

Front

What is the first quartile (Q1)?

Back

The first quartile (Q1) is the value that separates the lowest 25% of the data from the rest.

Front

What is the median?

Back

The median is the middle value of a data set when it is ordered from least to greatest.

Front

What is the third quartile (Q3)?

Back

The third quartile (Q3) is the value that separates the highest 25% of the data from the rest.

Front

What is the interquartile range (IQR)?

Back

The interquartile range (IQR) is the difference between the third quartile (Q3) and the first quartile (Q1). It measures the spread of the middle 50% of the data.

Front

How many values are between Q1 and Q3 in a data set of 20 numbers?

Back

In a data set of 20 numbers, there are 10 values between the first quartile (Q1) and the third quartile (Q3).

Front

How many values are between Q1 and the median in a data set of 20 numbers?

Back

In a data set of 20 numbers, there are 5 values between the first quartile (Q1) and the median.

Front

If the median score in a word game is 6.5 points, what does this indicate?

Back

This indicates that half of the scores are below 6.5 points and half are above.

Front

If the first quartile (Q1) in a word game is 5 points, what does this indicate?

Back

This indicates that 25% of the scores are below 5 points.

Front

What does an interquartile range (IQR) of 3 points mean?

Back

An IQR of 3 points means that the range of the middle 50% of the data is 3 points.