Q3 in case 20 values, so its indexes is 0 19 quartile3 index is 19*0.75 = 14.25 and quartile3 value Q3 = 0.75*12+0.25*13 = 12.25; Question2 Your Quartile calculator has an
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How do you find Q1 and Q3 from mean and standard deviation? You can use the following formulas to find the first (Q 1 ) and third (Q 3 ) quartiles of a normally distributed dataset: Q 1 =
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Q1 = mean − (0.5 × IQR) Q3 = mean + (0.5 × IQR) or simply: Q1 = mean − (0.675 × SD) Q3 = mean + (0.675 × SD) More answers below If the mean of a set of data is 65, and the standard deviation
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Finding Q1 and Q3 for a bell curve my textbook says the formula for Q1 is M-(.675)SD=Q1 for Q3 it's M+(.675)SD=Q3. So M is the median and SD is standard deviation and Q1 is minus and Q3