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A-level Maths Questions and Solutions


Coded data - mean and standard deviation

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Coded data - mean and standard deviation Empty Coded data - mean and standard deviation

Post by MathsTutor4You Mon Sep 07, 2015 10:18 am

The mark, x, scored by each student who sat a statistics examination is coded using

y=1.4x-20

The coded marks have mean 60.8 and standard deviation 6.60

Find the mean and the standard deviation of x.
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