An operator of a filling machine plotted the weights of each bag she filled for three weeks. at the same time, a quality inspector randomly took groups of five bags of the same output and plotted the average weights of the samples. the inspector's sampling distribution will: have a mean five times greater than the operator's distribution. show if the output has been produced to the operator's specifications. have less variability than the operator's distribution. have greater variability than the operator's distribution.

Steam at a pressure of 100 kpa and a quality of 50% initially fills a rigid vessel having a volume of 0.5 m^3. the steam is then heated, causing the pressure in the vessel to rise to 150 kpa. determine: i. the mass of the steam in the vessel. ii. the temperature and quality of the steam after the heating process. ii the mass of the vapour, mg and liquid, m in the vessel after the heating process. if the steam in the vessel is now further heated, what would the pressure and temperature in the vessel be when all steam has turned into saturated vapour? b. sketch the processes in part (a) and part (b) on p-v and t-v diagrams, indicating clearly the temperatures, pressures and the paths. c. (0.59kg, 111.4°c, 73%, 0.4307kg, 0.1 593kg, 2.11 bar, 121.84°c)