stormer                 package:MASS                 R Documentation

_T_h_e _S_t_o_r_m_e_r _V_i_s_c_o_m_e_t_e_r _D_a_t_a

_D_e_s_c_r_i_p_t_i_o_n:

     The stormer viscometer measures the viscosity of a fluid by
     measuring the time taken for an inner cylinder in the mechanism to
     perform a fixed number of revolutions in response to an actuating
     weight.  The viscometer is calibrated by measuring the time taken
     with varying weights while the mechanism is suspended in fluids of
     accurately known viscosity.  The data comes from such a
     calibration, and theoretical considerations suggest a nonlinear
     relationship between time, weight and viscosity, of the form 'Time
     = (B1*Viscosity)/(Weight - B2) + E' where 'B1' and 'B2' are
     unknown parameters to be estimated, and 'E' is error.

_U_s_a_g_e:

     stormer

_F_o_r_m_a_t:

     The data frame contains the following components:

     '_V_i_s_c_o_s_i_t_y' viscosity of fluid.

     '_W_t' actuating weight.

     '_T_i_m_e' time taken.


_S_o_u_r_c_e:

     E. J. Williams (1959) _Regression Analysis._ Wiley.

_R_e_f_e_r_e_n_c_e_s:

     Venables, W. N. and Ripley, B. D. (2002) _Modern Applied
     Statistics with S._ Fourth edition.  Springer.

