Mathematics, 06.05.2021 22:00 narwalmaster2001
(b) A car manufacturer claims that its cars are capable of travelling 9 kilometres per litre of fuel. Test runs with 90 cars result in an average distance travelled per litre of fuel of only 8.2 kilometres, with a standard deviation of 2.5 kilometres. Carry out a one tailed test at the 5% level to test the manufacturers claim.​
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(b) A car manufacturer claims that its cars are capable of travelling 9 kilometres per litre of fuel...
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