The value the upper quartile is the median of the upper half of the data. Let me write those, we have two nines then we have three 10s. The interquartile range is a measure of how spread out the data is.Ĭumulative frequency is plotted on the vertical axis and length is plotted on the horizontal axis. Well, the average of 10 and 10 is just going to be A cumulative frequency diagram is also a good way to find the interquartile range, which is the difference between the upper quartile and lower quartile. A high value for the interquartile range shows that the data is spread out. So the median is going to be I have the middle of the second half, Visually assessing standard deviation. So the first thing we wanna do is figure out the median here. The interquartile range is the difference between the lower quartile and the upper quartile. Songs on each album in Shane’s collection and so let’s see what’s going on here and like always, I encourage you to take a shot at it. So let’s see, the lowest number here looks like it’s a four. It’s going to be the average of these two numbers. So this is just representing the data in a different way but we could write this again as an ordered list so let’s do that.

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