Mathematics, 24.10.2020 14:00 karenjunior

A battery manufacturing company plans to test the hypothesis of variance population greater than 0.49 year with alpha 0.01.
A random sample of 15
batteries has a standard deviation of 0.5 years claims that the life of the batteries
is approximately normally distributed with a standard deviation of 0.7 year.
Is there enough evidence to support the company's claim?
I

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