QUESTION 16 It was found that the mean annual turnover rate of the Aspirin medicine bottle is 12. The management thirk that the mean w changed. Therefore, a random sample of 90 is chosen that shows the average is 21 and the standard deviation is 12. Use 0.00 significance level to test this claim Based on the above, the test statistic is equal to? (Round answer to two decimal places ex. 2.09)

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