coef.slt_fit            Extract coefficients from a fitted two-stage
                        life testing model
confint.slt_fit         Asymptotic (Wald) confidence intervals for a
                        fitted two-stage life testing model
fit_slt                 Fit a two-stage life testing model by maximum
                        likelihood
logLik.slt_fit          Extract the log-likelihood of a fitted
                        two-stage life testing model
loglik_slt              Two-stage cumulative-exposure log-likelihood
plot.slt_fit            Diagnostic plots for a fitted two-stage
                        life-testing model
plot_cdf                Fitted vs empirical CDF plot
plot_pp                 P-P (probability-probability) plot
plot_qq                 Q-Q (quantile-quantile) plot
plot_survival           Fitted vs empirical survival curve
print.slt_fit           Print a fitted two-stage life testing model
print.summary.slt_fit   Print a summary of a fitted two-stage life
                        testing model
pslt                    Population CDF/PDF/quantile function of a
                        two-stage step-stress model
rslt                    Simulate data from the two-stage life-testing
                        model
slt_bobotas_kateri_2015
                        Bobotas & Kateri (2015) simple step-stress data
slt_bootstrap_ci        Bootstrap confidence intervals for a fitted
                        two-stage life testing model
slt_cases               Identifiable parameter-sharing cases for
                        two-stage estimation
slt_dist                Baseline density, distribution and quantile
                        functions for a distribution
slt_equiv_age           Equivalent age under the elevated stress
slt_families            Available baseline lifetime distributions
slt_gof_ks              Kolmogorov-Smirnov goodness-of-fit test with
                        parametric-bootstrap correction for a fitted
                        two-stage life testing model
slt_han_kundu_2014      Han & Kundu (2014) simple step-stress data
slt_lrt                 Likelihood-ratio test between nested
                        parameter-sharing cases
slt_model_comparison    Compare several fitted models by information
                        criteria
slt_prob_stage1         Probability of observing at least one stage-1
                        failure (Laumen & Cramer, Lemma 4.1)
slt_reduce_params       Reduce full (theta0, theta1) parameters to a
                        case's free parameters
slt_tau                 p-th quantile of the baseline-stage
                        distribution
slt_wang_fei_2003       Wang & Fei (2003) simple step-stress data
slt_zhu_2010            Zhu (2010) simple step-stress data
summary.slt_fit         Summarise a fitted two-stage life testing model
vcov.slt_fit            Variance-covariance matrix of a fitted
                        two-stage life testing model's coefficients
