Twenty-five units were placed on test and the times to failure were recorded. The reliability engineer fit a Weibull model to the data using the following R code:

y = c( 3.6, 4.6, 5.8, 6.3, 7.0, 8.3, 9.3, 10.5, 10.7, 11.3, 11.8, 12.6, 13.7, 14.4, 14.9, 15.0, 16.0, 17.6, 18.9, 19.3, 20.1, 20.6, 29.5, 35.2, 37.2) library (MASS) fitdistry, "weibull") OUTPUT from R: shape scale 1.875 16.948 ( 0.279) ( 1.914)