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The manufacturer of a certain brand of chocolate requires the mean weight to be 400 g. A random sample of 100 packets has a mean

The manufacturer of a certain brand of chocolate requires the mean weight to be 400 g. A

random sample of 100 packets has a mean of 445 g with a variance of 26g^2. Test at 1% significance

level, whether there is evidence that the weight of the chocolate produced has exceeded the

manufacturer's requirement.

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