A-Level Maths: L4-01 [Outliers: Using the Quartiles and Interquartile Range]

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Hello there Jack Brown, is it possible if you could explain in the simplest way possible when i do interpolation or anything else with the frequency/normal table when do i need to round the x values for example in this question you do not use the boundaries for the class width why is this as i have been practicing some questions in the edexcel book and some of them are using upper/lower boundaries for the class width e.g 5 then 5.5 but some are not when interpolating or finding the median.

In this video you used 70 and 80 if i was to do this question i would have used 70.5 and 80.5 ???

Also what exam board are you teaching in your school??

Also great videos and do u have any recommediation to get any past papers thanks

Hacker
Edexcel AS Level Maths Student

MultiCODSHOOTER
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this for aqa?
cuz ive never seen finding IQR from grouped frequency

stormydoctor