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Finding the TI 83 interquartile range involves nothing more than entering your data list and pushing a couple of buttons. Sample problem: Find the TI 83 interquartile range for the heights of the top 10 buildings in the world (as of 2009). The heights, (in feet) are: 2717, 2063, 2001, 1815, 1516, 1503, 1482, 1377, 1312, 1272.

sciencing.com/how-to-calculate-the-interquartile-range...

The interquartile range (IQR) is used to represent the 25th percentile to the 75th percentile range. This middle 50 percent of a data set can be used to show the range an average performance would be. Showing the dispersion range rather than just one number can make the IQR more effective.

www.easycalculation.com/statistics/inter-quartile-range.php

Find IQR using interquartile range calculator which is the most important basic robust measure of scale and variability on the basis of division of data set in the quartiles. Use this online interquartile range (IQR) calculator to find the values of first quartile, third quartile, median and inter quartile range.

www.mathworksheetsland.com/6/42zIQR/lesson.pdf

Determining Interquartile Ranges Lesson Determine the interquartile range of the data set: 8, 7, 5, 4, 2, 8, 4 The Interquartile Range is the range between the first and third quarter. We can visually see this below: Interquartile Range = Quarter 3 – Quarter 1 Step 1: Arrange the numbers in order.

www.wikihow.com/Find-the-IQR

How to Find the IQR. The IQR is the "interquartile range" of a data set. It is used in statistical analysis to help draw conclusions about a set of numbers. The IQR is often preferred over the range because it excludes most outliers. Read...

www.reference.com/technology/calculate-interquartile-range...

To calculate the interquartile range in Microsoft Excel, first enter the values for which you want to calculate the interquartile range in one single column. To calculate the first quartile, select a blank cell, and enter "=QUARTILE(cell 1:cell 2,1)," where cell 1 and cell 2 are the actual cell labels in Excel.

www.mathsisfun.com/data/quartiles.html

Quartiles. Quartiles are the values that divide a list of numbers into quarters: ... To calculate it just subtract Quartile 1 from Quartile 3, like this: Example: The Interquartile Range is: ... And the Interquartile Range is: Q3 − Q1 = 15 − 4 = 11 Median Data Index.

www.varsitytutors.com/.../how-to-find-interquartile-range

How do you find the interquartile range? We can find the interquartile range or IQR in four simple steps: Order the data from least to greatest Find the median Calculate the median of both the lower and upper half of the data The IQR is the difference between the upper and lower medians; Step 1: Order the data

sphweb.bumc.bu.edu/otlt/MPH-Modules/BS/BS704_SummarizingData/BS704...

When a data set has outliers or extreme values, we summarize a typical value using the median as opposed to the mean. When a data set has outliers, variability is often summarized by a statistic called the interquartile range, which is the difference between the first and third quartiles.The first quartile, denoted Q 1, is the value in the data set that holds 25% of the values below it.

en.wikipedia.org/wiki/Interquartile_range

In descriptive statistics, the interquartile range (IQR), also called the midspread or middle 50%, or technically H-spread, is a measure of statistical dispersion, being equal to the difference between 75th and 25th percentiles, or between upper and lower quartiles, IQR = Q 3 − Q 1.