120 people were asked to read an article in a newspaper. The times taken, to the nearest...

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120 people were asked to read an article in a newspaper. The times taken, to the nearest second, by the people to read the article are summarised in the following table.

Calculate estimates of the mean and standard deviation of the reading times.

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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 02:03 AM

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120 people were asked to read an article in a newspaper. The times taken, to the nearest...

Question:

Time (sece 1-25 26–35 36-45 46-55 56–90 реople amb 4 24 38 34 20

Step by Step Answer:

To calculate the mean we need to find the midpoint of each time interval and then calculate the weig...View the full answer

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

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