Z = (score-mean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion indicated. Use the related Z value to solve for the score.
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
* 23 hours ago
* - 3 days left to answer.
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