Find the quartiles and Interquartile range

Measuring and comparing data


Find the lower quartile, upper quartile and interquartile range of a set of data represented in various forms that show all the data values. e.g. raw data list, stem and leaf diagram, frequency table. Understand the advantages and disadvantages of using the interquartile range as a measure of spread. Understand that the middle 50% of results lie between the upper and lower quartiles and interpret the meaning of the quartiles
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