Algebra-1

To find the difference between Q3 and Q1 for the data set: 5, 9, 12, 15, 18, 20, 22, 25, 28, 30, follow these steps:

Step 1: Order the Data Set
The data is already ordered:  
5, 9, 12, 15, 18, 20, 22, 25, 28, 30

Step 2: Find the Median (Q2)
The median (Q2) is the middle value of the data set.
Since there are 10 data points (an even number), the median is the average of the 5th and 6th values:

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