Delivery of first-class mail originating

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Reference no: EM13993021

An  efficiency  study was done on the delivery  of first-class  mail  originating  from  the four cities listed in the following table. Recorded for each city was the average length of time (in days) that it took a letter to reach a destination in that same city. Samples were taken on two occasions, Sept. 1,2001 and Sept. 1, 2004.

City

Sept 1, 2001

Sept. 1, 2004

Wooster

1.8

1.7

Midland

2.0

2.0

Beaumont

22

2.5

Mara:bester

1.9

1.7

Reference no: EM13993021

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