To find q1 first quartile calculator is the best option to avoid the manual calculations however you can do it by hand as well. first of all, you have to find the q2. In the above set to find q2 add 5

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The first quartile is the value of middle of the first term and the median. The median is the second quartile. The middle value of the median and the last term is the third quartile. Mathematically

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How to Calculate Quartiles. Step 1: Order the data values from smallest to largest. Step 2: Find the median {eq}Q2 {/eq} of the data set.

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The quartile formula for Q1 or first quartile formula can be expressed as: Q 1 = 1 ( n + 1 ) t h 4 \dfrac{1(n+1)^{th}}{4} 4 1 ( n + 1 ) t h term The Quartile Formula for Q 3