Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to your Z score.
Reverse the process for the next problem.
The time for an emergency medical squad to arrive at the sports center at the edge of a particular town is normally distributed with mean 17 minutes and standard deviation 3 minutes.
What is the probability that it will take the medical squad more than 22 minutes to arrive at the sports center?
0.4525
0.9525
0.0475
0.5475
none of the above
Additional Details
What is the arrival time in which 10% of all arrival times fall below?
13.16
17.00
20.84
16.25
5.48
1 answer