SOLUTION: General Hospital's on patient account division has compiled data on the age of accounts receivables. The data collected indicates that the age of the accounts follows a normal dist

Question 1163308: General Hospital's on patient account division has compiled data on the age of 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. Ahmad would like to know the probability of the accounts between 20 and 40 days old and the probability of the accounts which less than 30 days old. Shows the calculation of both problems.
Answer by Boreal(15235) (Show Source): You can put this solution on YOUR website!
z=(x-mean)/sd
so the first is (20-28)/8 or z=-1
and (40-28)/8 or z=1.5
that probability is 0.7745
fewer than 30 days is z<(30-28)/8 or 0.25
that probability is 0.5987
RELATED QUESTIONS
The average monthly sales of 5000 firms are normally distributed with mean Rs. 36,000 and (answered by Fombitz)

In 2010, Dr. Bob decided to gather research on the type of disorders that present among... (answered by CPhill)

At Trinity Hospital, 65 girls and 70 boys were born during July. Based on this data, find (answered by Boreal)

The following aged accounts receivable schedule was prepared for Dulax paints at the end... (answered by solver91311)

The following aged accounts receivable schedule was prepared for Dulax paints at the end... (answered by ikleyn)

Examining Relationships Question 3 Select one answer. 10 points If there is no... (answered by ikleyn)

Each year, ratings are compiled concerning the performance of new cars during the first... (answered by ikleyn)

A company has a current accounts receivable balance of Br. 392,164. Credit sales for the... (answered by ikleyn)

The number of miles,M,that a car can travel on a gallon of gas depends on the average... (answered by stanbon)