calibration.md
In envalysis: Miscellaneous Functions for Environmental Analyses

snapshot output consistent

Call:
calibration(formula = Area ~ Conc, data = din32645)

Coefficients:
(Intercept)         Conc  
       2481         9662

Adjusted R-squared:  0.983
Sum relative error:  0.7978

Blanks:
 [1] 2003 1901 2212 1976 2279 1853 2165 2108 2368 1943

     Conc   lwr   upr
LOD 0.053 0.036 0.096
LOQ 0.212 0.146 0.387

Check for normality of residuals:

    Shapiro-Wilk normality test

data:  residuals(calibration(formula = Area ~ Conc, data = din32645))
W = 0.90059, p-value = 0.2224

Check for homoscedasticity of residuals:

    studentized Breusch-Pagan test

data:  Area ~ Conc
BP = 1.6198, df = 1, p-value = 0.2031

Call:
calibration(formula = Area ~ Conc, data = din32645, check_assumptions = F)

Coefficients:
(Intercept)         Conc  
       2481         9662

Adjusted R-squared:  0.983
Sum relative error:  0.7978

Blanks:
 [1] 2003 1901 2212 1976 2279 1853 2165 2108 2368 1943

     Conc   lwr   upr
LOD 0.053 0.036 0.096
LOQ 0.212 0.146 0.387

Call:
calibration(formula = Meas ~ Conc, data = neitzel2003)

Coefficients:
(Intercept)         Conc  
    0.02753      2.48461

Adjusted R-squared:  0.9975
Sum relative error:  0.416

Blanks:
 [1] 0.027 0.033 0.041 0.028 0.018 0.022 0.029 0.038 0.024 0.023

     Conc   lwr   upr
LOD 0.009 0.006 0.016
LOQ 0.086 0.059 0.157

Check for normality of residuals:

    Shapiro-Wilk normality test

data:  residuals(calibration(formula = Meas ~ Conc, data = neitzel2003))
W = 0.85678, p-value = 0.06991

Check for homoscedasticity of residuals:

    studentized Breusch-Pagan test

data:  Meas ~ Conc
BP = 0.24883, df = 1, p-value = 0.6179