orings           package:DPpackage           R Documentation(latin1)

_C_h_a_l_l_e_n_g_e_r _S_p_a_c_e _S_h_u_t_t_l_e _O-_R_i_n_g _D_a_t_a

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

     The motivation for collecting this database was the explosion of
     the USA Space Shuttle Challenger on 28 January, 1986. The Rogers
     commission  concluded that the Challenger accident was caused by
     gas leak through  the 6 o-ring joints of the shuttle. Dalal,
     Fowlkes and Hoadley (1989)  looked at the number of distressed
     o-rings (among the 6) versus launch  temperature (Temperture) and
     pressure (Pressure) for 23 previous  shuttle flights. The previous
     shuttles were launched at temperatures  between 53F and 81F.

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

     data(orings)

_F_o_r_m_a_t:

     A data frame with 138 observations on the following 4 variables.

     _T_h_e_r_m_a_l_D_i_s_t_r_e_s_s a numeric vector indicating wether the o-ring
          experienced thermal distress

     _T_e_m_p_e_r_a_t_u_r_e a numeric vector giving the launch  temperature
          (degrees F)

     _P_r_e_s_s_u_r_e a numeric vector giving the leak-check pressure (psi)

     _F_l_i_g_h_t a numeric vector giving the temporal order of flight

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

     Dalal, S.R., Fowlkes, E.B., and Hoadley, B. (1989). Risk analysis
     of  space shuttle : Pre-Challenger Prediction of Failure, Journal
     of the  American Statistical Association, 84: 945 - 957.

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

     Dalal, S.R., Fowlkes, E.B., and Hoadley, B. (1989). Risk analysis
     of  space shuttle : Pre-Challenger Prediction of Failure, Journal
     of the  American Statistical Association, 84: 945 - 957.

     Lavine, M. (1991). Problems in extrapolation illustrated with
     space  shuttle O-ring data.  Journal of the American Statistical
     Association,  86: 919-922.

     Martz, H. F., Zimmer, W.J. (1992). The risk of catastrophic
     failure of the solid rocket boosters on the space shuttle. The
     American  Statistician, 46: 42-47.

_E_x_a_m_p_l_e_s:

     data(orings)
     ## maybe str(orings) ; plot(orings) ...

