Pogen. The mean blood urea level of the patients undergoing dialysis is that is said to have a good prognosis if it reaches 8.6 mmol/L and a standard deviation of 0.3. They randomly select 36 dialysis patients in Hospital A with a mean blood urea level of 8.7 mmol/L. Does the dialysis patients in Hospital A have blood urea nitrogen greater than 8.6 mmol/L? Use 95% confidence limit.

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