cathedryl3746 cathedryl3746

16-02-2024
Engineering

contestada

An automobile tyre manufacturer claims that the average life of a certain grade of tyre is greater than 25000 km. when used under normal driving conditions on a car of certain weight. A random sample of 15 tyres was tested, and a mean and standard deviation of 27000 and 5000 km. respectively were computed. Can we conclude that the manufacturer's product is as good as claimed?

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