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QUESTION 5 [4] A courier service company has found that their delivery time of parcels to clients...

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Statistics

QUESTION 5 [4]

A courier service company has found that their delivery time ofparcels to clients is approximately normally distributed with amean delivery time of 30 minutes and a variance of 25 minutes(squared).

a) What is the probability that a randomly selected parcel willtake between 26 and 42 minutes to deliver? (2)

b) What is the maximum delivery time (minutes) for the 2.5% ofparcels with the shortest time to deliver? (2)

Answer & Explanation Solved by verified expert
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Solution We are givena We are required to findUsing the zscore formula we haveUsing the    See Answer
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