its in my maths home work i have no idea?What does this mean? compare the middle of each distribution using the range and inter-quartile range?The range and the inter-quartile range both give an indication of how well spread the data is.
The range can be calculated by taking the "largest number" in the data minus the "smallest number"
The inter-quartile range is slightly more tricky. First you need to order the data in order from lowest to highest.The inter-quartile range is similar to the range except instead of taking the highest and smallest number you take the range of the middle 50%. (I know its difficult but hang on with me here!)
Say you have 20 ordered numbers. (Lowest to highest)
The middle 50% would be numbers 6-15.
(it is 6 and not 5 because you have 5 numbers which make up the first 25%, 10 numbers which make up the middle 50 percent, and 5 numbers make up the last 25%)
The interquartile range of the above example, would be the 15th number minus the 6th number.
I hope that explains!
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