challenger               package:mcsm               R Documentation

_O-_r_i_n_g _f_a_i_l_u_r_e_s _a_g_a_i_n_s_t _t_e_m_p_e_r_a_t_u_r_e _f_o_r _s_h_u_t_t_l_e _l_a_u_n_c_h_e_s

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

     This dataset records the occurence of failures in the O-rings of
     space shuttles against the temperature at the time of the
     launches. One (1) stands for a failure and zero for a success.

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

     data(challenger)

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

     A data frame with 23 observations on the following 2 variables.

     '_o_r_i_n_g' Occurence or not of an O-ring failure

     '_t_e_m_p' Temperature at the time of the launch

_D_e_t_a_i_l_s:

     In 1986, the space shuttle Challenger exploded during take off,
     killing the seven astronauts aboard. The explosion was the result
     of an O-ring failure, a splitting of a ring of rubber that seals
     the parts of the ship together. The accident was believed to be
     caused by the unusually cold weather (31 degrees F or 0 degrees C)
     at the time of launch, as there is reason to believe that the
     O-ring failure probabilities increase as temperature decreases.

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

     Dalal, S.R., Fowlkes, E.B. and Hoadley, B. (1989) Risk analysis of
     the space shuttle: pre-Challenger prediction of failure. J.
     American Statistical Association, 84, 945-957.

     See Chapters 6 and 7 of  *EnteR Monte Carlo Statistical Methods*
     by Christian P. Robert and George Casella

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

     data(challenger)
     plot(challenger$temp,challenger$oring)

