the box and whiskers plot can be drawn using five simple steps. to draw a box and whisker diagram, we need to find: step 1: the smallest value in the data is called the minimum value. step 2: the value below the lower 25% of data contained, called the first quartile. step 3: ...
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 on to learn how to find the IQR! Method 1 Organizing the Data ...
Calculate the upper quartile, if necessary. Usually, you will calculate a fraction or decimal using the formula. In this instance, find the value above and below this position in the data set, and find their mean, or average. To do this, divide the sum of the two values by 2. This ...
Find the IQR by subtracting Q1 from Q3.[5] Use the formulas Q1 - 1.5 x IQR and Q3 + 1.5 x IQR to find the range of the box plot. If a number goes outside of this range, then it’s an outlier. Mark outliers as dots on your number line below the box plot.[6] Example 1:...