Question
If a completion time for a task is normally distributed with a mean of 15 seconds and a standard deviation of 2.5 seconds, what is the probability of getting a time less than 9.7 seconds?
Answers
PsyDAG
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 that Z score.
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to that Z score.