A company has a contract to supply specialized batteries to a manufacturer with a mean width of 54mm and a variance of 1.8 or less with an alpha of 0.05.The company randomly tests 20 of these batteries to ensure that they are meeting the requirements of the contract.What would be the null hypothesis each time the company conducts the test of the variances? A)$\sigma$² = 0.05 B)$\sigma$² ≥ 1.34 C)s² = 1.8 D)$\sigma$² $\le$ 1.8 E)$\mu$= 54

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Quizplus · Accepted Answer

The null hypothesis for testing variance is that the population variance is less than or equal to the specified variance, which in this case is 1.8.

A Company Has a Contract to Supply Specialized Batteries to a Manufacturer