SOLUTION: The time required for the credit card application process follows a normal distribution with a mean of 10 days and a standard deviation of 4 days. Find the probability that the tim

Question 624428: The time required for the credit card application process follows a normal distribution with a mean of 10 days and a standard deviation of 4 days. Find the probability that the time taken to process a particular credit card application
(a) exceeds 13 days
(b) is less than 5 days
Please help me to solve this problem for me.
Answer by Emsley(35) (Show Source): You can put this solution on YOUR website!
Standardised normal variable is z= (13-10)/4=0.75
Look up 0.75 in the normal tables. Then because question says greater than 13 you want 1-(this value)
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