Premanufactured wooden roof trusses allow builders to comple

Premanufactured wooden roof trusses allow builders to complete projects faster and with lower on-site labor costs. The connector plates for trusses are made from Grade A steel and are hot-dip galvanized. The thickness of a truss connector (in inches) varies slightly and has a uniform distribution with a = 0.036 and b = 0.05. Fill in the blank.

Suppose the manufacturer will only use connectors with a minimum thickness of 0.04 inches. The proportion of connectors rejected is.

The standard deviation of the thickness of a truss connector is

Solution