The time taken, in minutes, to fit a new windscreen to a car is normally distributed with

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The time taken, in minutes, to fit a new windscreen to a car is normally distributed with mean μ and standard deviation 16.32. Given that three-quarters of all windscreens are fitted in less than 45 minutes, find:

a. The value of μ

b. The proportion of windscreens that are fitted in 35 to 40 minutes.

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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 14, 2021 02:11 AM

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The time taken, in minutes, to fit a new windscreen to a car is normally distributed with

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a To find the value of we can use the fact that threequarters of all windscreens are fitted in less ...View the full answer

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

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