Statistics for Environmental Engineers

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Apr.


58131


67914


66606


65781


64084


66916


69196


74188


76514


74362


May


62700


65339


62560


58731


64958


67086


68337


66269


71019


74906


June


51305


60336


64060


65650


68022


68241


60917


73624


70342


71035


July


54603


60078


61180


59509


70979


68366


61938


69896


69160


76591


Aug.


58347


57836


55476


59797


74727


73214


68481


65997


72799


78417


Sept.


57591


54395


57522


67213


67948


68794


80666


70790


69912


76859


Oct.


59151


56723


57563


60132


65956


71463


73281


72233


71734


78826


Nov.


57777


67361


61846


63791


67001


70107


67404


72166


73614


73718


Dec.


61707


57618


59829


66234


65105


63205


68807


71104


75573


73825

51.2 Phosphorus Loading. The table below gives 16 years of phosphorus loading (lb/day) data for a municipal wastewater treatment plant. Interpret the data using time series analysis.


Month


1993


1994


1995


1996


1997


1998


1999


2000


Jan.


2337


2089


2095

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