The heights, xcm, of a group of 82 children are summarised as follows. (x 130) = 287,
Question:
The heights, xcm, of a group of 82 children are summarised as follows.
Σ(x −130) = −287, standard deviation of x = 6.9.
i. Find the mean height.
ii. Find Σ(x −130)2.
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a The mean height of the children ...View the full answer
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Related Book For 
Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook
ISBN: 9781108407304
1st Edition
Authors: Dean Chalmers, Julian Gilbey
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