The 1% critical value is 2.576

Since we have two sided alternative, very high or very low values will entail in the rejection of null hypothesus.

The decision rule is:

If | z | > 2.576, then reject the null hypothesis

Otherwise do not reject the null hypothesis

I do not know whether you will use | symbol.

If z > 2.576 or if z < -2.576 , then we reject the null hypothesis

Otherwise we do not reject the null hypothesis

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