A courier service company has found that their delivery time of parcels to clients is normally distributed with a mean of 22 minutes and a standard Deviation of 4 minutes. What is the probability that a randomly selected parcel will take less than 13 minutes to deliver to the client?
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1 answer

Z = (scoremean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score. 👍
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answered by PsyDAG
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