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What is the maximum significance level that the null hypothesis is not rejected?

How do I calculate it?

Context:

The weight of a plate is a normally distributed variable with μ=330 gr. and standard deviation σ=5 gr. A sample of 25 plates has a mean weight of 333 gr. Given that the variance is σ^2=25, test the hypothesis that the population mean has increased (or it has remained the same), with a significance level of 10 %. What is the maximum significance level that the null hypothesis is not rejected?

Glen_b
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george
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    You don't. You specify it. Perhaps you should review material on hypothesis tests and p-values. We have some good threads: see https://stats.stackexchange.com/questions/31/what-is-the-meaning-of-p-values-and-t-values-in-statistical-tests for instance. – whuber Oct 10 '18 at 22:04
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    Please offer some of the context that led to your question. (Are you perhaps asking about a p-value?) – Glen_b Oct 11 '18 at 10:00

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