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hi, can someone help me answer this question? thankyou A car manufacturer claimed that the average gas mileage of its new brand of hybrid car

hi, can someone help me answer this question? thankyou
A car manufacturer claimed that the average gas mileage of its new brand of hybrid car is 25 miles per litre. The gas mileages for ten randomly selected hybrid cars of the new brand are recorded as below: 24.4 25.1 22.6 26.2 25.3 23.2 21.9 23.8 24.5 25 Assume that the gas mileage is normally distributed. Does the sample data support the manufacture's claim at the 5% level of significance? (20 marks)

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