To find the first quartile of a set of numbers, find the median of the lowest half of the data set. This median is the first, or lowest, quartile in the data set. To find the third, or upper, quartile of a data set, instead find the median of the higher half of numbers in the set.
Continue ReadingQuartiles divide a set of numbers into four equal parts. To find the highest and lowest quartiles in a data set, first find the median of the entire set of numbers. Treat the sets of numbers above and below the median as separate sets, and then locate the medians of these groups. The median of the lowest set of numbers corresponds to the lowest, or first, quartile. The median of the entire set corresponds to the second quartile, whereas the median of the highest set corresponds to the highest, or third, quartile.
Quartiles are calculated differently for odd and even numbers of values. If a data set has an odd number of digits, the median is the middle value. If a data set has an even number of digits, the median is the average of the middle two numbers. To find this average, add the two middle numbers together, and then divide the sum by two.
Learn more about Math CalculatorsMean, median and mode are different ways of determining the average from a set of numbers. Range gives the difference between the highest and lowest values.
Full Answer >To find the median of a set of numbers, line the numbers up in numerical order and find the number in the middle. The median of a set of data is simply the number in the numerical middle.
Full Answer >Calculate the median of a set by putting the numbers in order from least to greatest and finding the middle number, when there is an odd number of values in the set. When there is an even number of values, find the median by averaging the two middle values.
Full Answer >The median is the middle number when a set of numbers is arranged in order from smallest to largest, and the mean is the average of a set of numbers. Both these measurements are useful in performing statistical analyses of a number grouping and making projections about future results.
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