Algebra II : Quartiles

Study concepts, example questions & explanations for Algebra II

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Example Questions

Example Question #11 : Statistical Concepts

Determine the first quartile of the following set of numbers:  

Possible Answers:

Correct answer:

Explanation:

The first quartile refers to the median of the two numbers below the median, which is .  

Since the numbers  and  are below the median, find the median of these two numbers to determine the first quartile.

The first quartile is:  

Example Question #452 : Algebra Ii

Which of the following represents the third quartile?  

Possible Answers:

Correct answer:

Explanation:

The data set is in chronological order.  The median is 16.

The third quartile represents the median of the numbers that are above the known median.

Breaking the set into two

To find the third quartile we will take the median of the second cluster of numbers.

Therefore the third quartile is 23.

Example Question #11 : Quartiles

How much data is above the 3rd quartile of a distribution?

Possible Answers:

Correct answer:

Explanation:

The third quartile, by definition, means that 75% of the data is below the data point. That means 25% is above (100%-75%).

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