Atrazine                package:NADA                R Documentation

_A_t_r_a_z_i_n_e _c_o_n_c_e_n_t_r_a_t_i_o_n_s _i_n _N_e_b_r_a_s_k_a _g_r_o_u_n_d _w_a_t_e_r - _A_n_o_t_h_e_r _F_o_r_m_a_t

_D_e_s_c_r_i_p_t_i_o_n:

     The same atrazine concentrations as in Atra, stacked into one
     column (col.1).  Column 2 indicates the month of collection. 
     Column 3 indicates which data are below the detection limit those
     with a value of 1.

     Objective is to determine if concentrations increase from June to
     September. There is one detection limit, at 0.01 ug/L.  Used in
     Chapter 9 of the NADA book.

_U_s_a_g_e:

     data(Atrazine)

_S_o_u_r_c_e:

     Junk et al., 1980, Journal of Environmental Quality 9, pp.
     479-483.

_R_e_f_e_r_e_n_c_e_s:

     Helsel, Dennis R. (2005).  Nondectects and Data Analysis;
     Statistics for censored environmental data.  John Wiley and Sons,
     USA, NJ.

