7- A study is carried out with work sampling at a workstation. After 1000 observations, it was observed that machine A was empty 250 times. Determine between which limits the operating efficiency (number of runs) of the machine can vary with 95% confidence. 0= pq N p+q = 1 q=1-pise; p+ (1-p) = 1 Pmin = Port Port X = Pmax Port + Port x h Z h 100 h 100

7 - A study is carried out with work sampling at a workstation. After 1000 observations, it was observed that machine A was empty 250 times. Determine between which limits the operating efficiency (number of runs) of the machine can vary with 95% confidence. =Npq=zhp+q=1q=1pise;p+(1p)=1Pmin=PortPort100hPmax=Port+Port100h