CuZnAlt                 package:NADA                 R Documentation

_Z_i_n_c _c_o_n_c_e_n_t_r_a_t_i_o_n_s _o_f _t_h_e _C_u_Z_n _d_a_t_a _s_e_t

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

     Zinc concentrations of the CuZn data set;  concentrations in the
     Alluvial Fan zone have been altered so that there are more
     nondetects. This produces a greater signal, even with more
     nondetects.

     Objective is to determine if zinc concentrations differ between
     the two zones.  Zinc has two detection limits, at 3 and 10 ug/L. 
     Used in Chapter 9 of the NADA book.

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

     data(CuZnAlt)

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

     Altered from the data of Millard and Deverel, 1988, Water
     Resources Research 24, pp. 2087-2098.

_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.

