these are t/f and choices thank you

If the log-survival plot is a straight line, the time to event That an exponential distribution, O True OFahe . In PROC LifeTest, the Kaplan-Meier estimator shows the estimate for every distinct time t. while the life table method groups event times into reasonable Intervals, O True O Fake. Which of the following statements about smoothed hazard plot is true? The hazard increases over time. The bandwidth used to smooth the harand curve is determined by the confidence level of the confidence limits. The confidence limits of the smoothed hazard curve are extra large at both ends of the plot. This is because the confidence level is different and is higher at the ends. The smoothed hazard plot generally has the same overall trend in the estimated hazard plot. When you specify Method-Life in the PROC LIFETEST statement SAS will compute the test statistics like log-rank and Wilcoxon statistics from the grouped data (If available). so they are affected by the choice of intervals for the life-table method. O False PROC LifeTest uses a forward stepwise selection to test for the collective effect of covariates and the Incremental effect of the single covariate as well, Which of the following statements about forward selection are true? Check all that apply. (] Forward selection is sequential selecting coverudri baud on the result of univaralate tests. [In the second and later steps, forward selection al ntially about the one with the blagest incremental effect from the The covariates that are statistically signincan sanificant incremental impact in the forvad step () When selecting from the univariates tests. the covanut the Left chi acquire will be selected In the first step