The time spent walting in the line is approximately normally distributed. The me
ID: 3376100 • Letter: T
Question
The time spent walting in the line is approximately normally distributed. The mean waiting time is 5 minutes and the standard deviation of the waiting time is 3 minutes. Find the probability that a person will wait for more than 11 minutes. Round your answer to four decimal places If you would like to look up the value in a table, select the table you want to view, then either click the cell at the intersection of the row and column or use the arrow keys to find the appropriate cell in the table and select it using the Space key Normal Table-to zExplanation / Answer
Let X minutes be the waiting time in the line
Given: Normal distribution with Mean,u = 5 minutes
Standard deviation,s = 3 minutes
To find, P(X > 11)
For X = 11, Z score = (X - u)/s = (11 - 5)/3 = 2
Thus, P(X > 11) = P(Z > 2) = 0.0228 [From Z table]