# Statistics for Environmental Engineers

Скачать в pdf «Statistics for Environmental Engineers»

79884

83716

Mar

70185

67380

Mar

75395

77861

Apr

76514

78533

Apr

74362

76132

May

71019

68696

May

74906

81796

Jun

70342

73006

Jun

71035

84288

Jul

69160

73271

Jul

76591

82738

Aug

72799

73684

Aug

78417

85008

Sep

69912

71629

Sep

76859

74226

Oct

71734

66930

Oct

78826

83275

Nov

73614

70222

Nov

73718

73783

Dec

75573

76709

Dec

73825

78242

31.4    Rounding. Express the data in Exercise 31.3 as thousands, rounded to one decimal place, and recalculate the correlation; that is, the Jan. 1999 BOD becomes 68.3.

31.5    Coliforms. Total coliform (TC), fecal coliform (FC), and chlorine residual (Cl2 Res.) were measured in a wastewater effluent. Plot the data and evaluate the relationships among the three variables.

 Cl2 Res. (mg/L) ln(TC) ln(FC) Cl2 Res. (mg/L) ln(TC) ln(FC) Cl2 Res. (mg/L) ln(TC) ln(FC) 2.40 4.93 1.61 1.80 5.48 1.61 1.90 4.38 1.61 1.90 2.71 1.61 2.90 1.61 1.61 2.60 1.61 1.61 1.00 7.94 1.61 2.80 1.61 Скачать в pdf «Statistics for Environmental Engineers» P. M. Berthouex, L. C. BrownISBN 1-56670-592-4Метки учебные пособия