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A salesperson claims that their company has developed a supplement that influences human memory. The direction of this hypothesis test is two-tailed and the test

A salesperson claims that their company has developed a supplement that influences human memory. The direction of this hypothesis test is two-tailed and the test statistics of z=2.91 was observed. If testing at an alpha level of 0.01, would the null hypothesis (H0) be rejected or retained?

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