2.2      True Value = 0.5000 inches

            Determination of Bias Error.

            First, the average of readings must be calculated:

            Average of Readings =

            Bias Error =  Average of Readings -True Value

                            

            Determination of Maximum Precision Error:

            Maximum Precision Error =

                                                     

 

2.3       Readings:

20.2, 20.2, 20.6, 20.0, 20.4, 20.2, 20.0, 20.6, 20.0, 20.2 (lb)

            First determine the average of the reading:

                                    Average W = 20.2 lb

            For bias error,

                                    Bias Error =  Average Value -True Value

                                                     = 20.24-20.0

                                                     = 0.2 lb

            For maximum precision error, we need the reading with the greatest deviation from the average reading (20.6 lb).  Therefore,

                                    Maximum Precision Error = 20.6 -20.2  = 0.4 lb