The following repair times were obtained during product testing as part of a maintainability…

The following repair times were obtained during product
testing as part of a maintainability assessment. If the maintainability goals
include an MTTR of 4 hr and 90 percent of the repairs are to be completed
within 10 hr, are the goals being achieved? Answer by constructing a 95 percent
confidence interval for the MTTR and an empirical cumulative distribution
function. Times are in hours: 6.0,7.5,5.0,4.0,4.5,5.1, 14,8.5, 10.2,5.5,5.8,
11.5,8.9, 10.0,5.7,4.4,6.5,7.0,8.0,7.7.