問題詳情
1.[30%] The daily concentration of pollutants in a river has a mean of 70 mg/ and a standard deviation of 10mg/l.
【題組】(i) (10%) Suppose that the daily concentration follows a normal distribution. The critical level of pollutantconcentration would be reached if the daily concentration exceeds 100 mgl. What is the probabilitythat the daily concentration of pollutants in the river would not exceed the critical level?
參考答案