GCSE Maths from Scratch 9.02b Finding the Median

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If we have large amount of data, it would be time consuming to find out median. Is there any short formula to find out median?

ghafarhussain
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So we can conclude that if the number of our data was odd we must choose the value in the middle just after sorting the data and if it was even number we had to average the two values in the middle, the question arise here can I assume that the median is the second quartile and do the needed interpolation also if I did assume that my median is the fifth percentile it doesn't gives me an exact value why is that ?

mohammaddawodieh