A car rental company claims that, on average, its class C-type car will use 7.1 litres of
Question:
A car rental company claims that, on average, its class C-type car will use 7.1 litres of fuel per 100 km when travelling at 60 km/h. Seven class C cars are tested on a test track and their fuel use over 100km is measured.
a. Assuming a normal distribution, find a 95% confidence interval for the mean amount of fuel used.
b. Comment on the claim by the car rental company that its class C cars use 7.1 litres of fuel per 100km.
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a To find the 95 confidence interval for the mean amount of fuel used we can use the following formu...View the full answer
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Related Book For 
Cambridge International AS & A Level Further Mathematics Coursebook
ISBN: 9781108403375
1st Edition
Authors: Lee Mckelvey, Martin Crozier
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