The heights, xcm, of a group of 28 people were measured. The mean height was found to

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The heights, xcm, of a group of 28 people were measured. The mean height was found to be 172.6cm and the standard deviation was found to be 4.58cm. A person whose height was 161.8cm left the group.

i. Find the mean height of the remaining group of 27 people.

ii. Find Σx² for the original group of 28 people. Hence find the standard deviation of the heights of the remaining group of 27 people.

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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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Question Posted: Sep 13, 2021 01:40 AM

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The heights, xcm, of a group of 28 people were measured. The mean height was found to

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i The mean height of the remaining group of 27 people is 17318cm ii x2 749112 ...View the full answer

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

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