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There is a claim that the mean annual turnover rate of bottle of B Aspirin is 23. It is suspected that the mean is

There is a claim that the mean annual turnover rate of bottle of B Aspirin is 23. It is suspected that the mean is changed. Therefore, a random sample of 76 is chosen that shows the average is 19 and the standard deviation is 8. Use 0.02 significance level Based on the above, the test statistic is equal to? (Round answer to two decimal places ex. 2.09)

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