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GailKT
Oct 29, 2007, 08:23 AM
I have a statistic problem and I was wondering if anyone could help solve it. Here's the question.



General Hospital’s patient account division has compiled data on the age of its accounts receivables. The data collected indicates that the age of the accounts follows a normal distribution with mean=28 days, and standard deviation= 8 days. What percentage of the accounts is between 20 and 40 days old?