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Formula For Interquartile Range. The value of Q3 is stored in cell D4 and that of Q1 in cell D3. The quartiles can be determined following the same approach that we used to determine the median but we now consider each half of the data set separately. Take an example where all datasets are arranged on a number line. The interquartile range formula is given below.
For calculating the quartile class apply the formula given under the individual series. Interquartile Range Quartile 3 Quartile 1 After calculating quartiles its rather easy to calculate an interquartile range. Calculate the interquartile range. Q 1 can also be found by using the following formula large Q_1leftfracn14rightthterm Q 3 can also be found by using the following formula. The formula will be. And from the above equations let us see the interquartile range formula IQR Q 3 Q 1.
Q 3 Third quartile.
Recall that the formula for calculating IQR is eqQ_3 - Q_1 eq where eqQ_1 eq is the first quartile or 25th percentile and eqQ_3 eq is the third. The interquartile range is found by subtracting the Q1 value from the Q3 value. InterQuartile Range IQR Third Quartile - First Quartile. For calculating the quartile class apply the formula given under the individual series. Q3 can also be calculated by using the following formula. Q1n14 th term whereas.