Class B’s scores are more concentrated and less spread out than Class A. In conclusion, Class A generally has higher scores, with both the mean and median being higher than class B. Learn how to calculate and interpret the mean, median, mode and range to find averages with this BBC Bitesize Maths article. Now, let’s look at range to consider the spread of data: Midrange statistics are the arithmetic mean of the maximum and minimum values in a data set. It is a relatively straight-forward measure of central tendency. Order Class B: 50, 51, 56, 59, 60, 63, 66, 70, 84 The midrange is infrequently used and hardly known. Mean of Class A: \dfracĪs neither of the classes have any repeated scores, we can’t use the mode. Give 3 comparisons between the results of these 2 maths classes It is sometimes called the H-spread and is a stable measure of disbursement. Two Maths teachers are comparing how their Year 9 classes performed in the end of year exams.Ĭlass A: 76, 35, 47, 64, 95, 66, 89, 36, 84Ĭlass B: 51, 56, 84, 60, 59, 70, 63, 66, 50 Interquartile range is the distance between the first and third quartiles.
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