![]() Quartile 3 is the point so that the area on the left of it is 0.75 and the area on the right of it is 0.25.īelow are two graphics that show quartiles for continuous probability distributions.Ĭonsider a continuous uniform distribution that takes value 0 for values of X from -0.25 to 0.75 and takes value 0 otherwise, as shown below.The median is the point so that the area on the left of it is 0.5 and the area on the right of it is 0.5.Quartile 1 is the point so that the area on the left of it is 0.25 and the area on the right of it is 0.75.The total area under any probability distribution curve is 1. Consider continuous probability distributions. For continuous data, the idea behind quartiles remains the same. You have learned how to find quartiles for discrete data. The middle point of the left part is quartile 1 and the middle point of the right part is quartile 3. ![]() Median divides the data set into two equal parts – the left part and the right part. If you notice, there are 3 data points to the left of 4 and 3 data points to the right of 4. This is found by dividing the data set into two equal parts. Find the median, the middle value, first.
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