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Hangels86

A popular private mail delivery service started a campaign to reduce cost in order to improve their gross profit by mandating their drivers reduce their driving distance per route by 5 miles. After three months, the average distance reduced per driver per route was found to be 4.28 miles with a standard deviation of 0.59 miles. Below are the average weekly results for three drivers:

 

Driver #1: 5.2 miles/route

Driver #2: 2.4 miles/route

Driver #3: 4.28 miles/route

 

Find the z-scores for each driver and interpret the meaning of the results of your z-score calculations. 

    • 10 years ago
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