The totals x 2 = 7931, x = 397 and y = 499 are given by 29

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The totals Σx² = 7931, Σx = 397 and Σy = 499 are given by 29 values of x and n values of y. All the values of x and y together have a variance of 52.

a. Express y² in terms of n.

b. Find the value of n for which y² − x² = 10.

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Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

ISBN: 9781108407304

1st Edition

Authors: Dean Chalmers, Julian Gilbey

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The totals x 2 = 7931, x = 397 and y = 499 are given by 29

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a y2 n4992 b n 7931 3972 104992 Explanation a To find ...View the full answer

Cambridge International AS & A Level Mathematics Probability & Statistics 1 Coursebook

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