At a village fair, visitors were asked to guess how many sweets are in a glass jar.

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At a village fair, visitors were asked to guess how many sweets are in a glass jar. The best six guesses were 180, 211, 230,199, 214 and 166.

a. Show that the mean of these guesses is 200, and use SD = √Σ(x – x̅)²/n to calculate the standard deviation.

b. The jar actually contained 202 sweets. Without further calculation, write down the mean and the standard deviation of the errors made by these six visitors. Explain why no further calculations are required to do this.

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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 01:57 AM

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At a village fair, visitors were asked to guess how many sweets are in a glass jar.

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a To show that the mean of these guesses is 200 we can use the following formula to calculate the me...View the full answer

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

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