![]() Now construct a vertical line through the median that hits both ends of the rectangle. We will first draw a number line that fits the data, and plot all the necessary values we found.Ĭonstruct a rectangle that encloses the median of the entire data set that its vertical lines pass through the upper and lower quartiles. Now that we have all our necessary values, we will construct our box and whisker plot. I Q R = U p p e r q u a r t i l e ( Q 3 ) - l o w e r q u a r t i l e ( Q 1 ) = 20 - 10 = 10 Khan Academy is a nonprofit with the mission of providing a free, world-class education for. ![]() Learn for free about math, art, computer programming, economics, physics, chemistry, biology, medicine, finance, history, and more. Stuck Review related articles/videos or use a hint. ![]() We can now find the inter-quartile range by the formula, Find the interquartile range (IQR) of the data in the dot plot. That means that we are finding the median for 18, 20, 32 The upper quartile is the median for the second half of the data set. That means that we are finding the median for 5, 10, 16 The lower quartile is the median for the first half of the data set. We will now find the upper and lower quartiles. We can now identify the midpoint value (median) of the data set, H i g h e s t v a l u e = 32 L o w e s t v a l u e = 5 Now identify the highest and lowest values in the data set We rearrange the values in the data set from lowest to highest.
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