Theory + Problems Control charts for variables, x bar chart , R chart, statistical quality control

Solve Problems on Control charts for variables by using- 1. Control charts for sample means ( x bar chart) 2. Control charts for sample ranges ( R chart) A quality inspector took 5 samples each with four observations (n=4) of the length of time for glue to dry. The analyst computed the mean of each sample and then computed grand mean. All values are in minutes. Use this information to obtain 3 sigma control limits for mean of future times . It is known from previous experience that the standard deviation of the process is 0.02 minute. A company manufactures screws to a nominal diameter 0.500+- 0.030 cm. Five samples were taken randomly from the manufactured lot and 3 measurements were taken on each sample at different lengths. The readings are shown in table. Calculate Co trolley limits on x bar and R chart and draw the chart . [ Dayalbagh Edu. Institute Agra BBM May, 2010 ] Please refer my following Playlists , Links are given: 1. Theory of Machines or Kinematics of Machines play list    • Theory Of Machines playlist   2. Fluid mechanics and Hydraulic machines playlist    • Fluid mechanics and hydraulic machines   3. Refrigeration and air conditioning playlist    • Refrigeration and air conditioning   4. Renewable Energy engineering or Non-convensional energy sources play list    • Renewable energy engineering/ Non-conventi...   5. Dynamics of Machinery play list    • Dynamics of machinery / Mechanical Vibrati...   6. Engineering graphics or Engineering drawing play list    • Engineering Graphics Playlist   7. Engineering Mechanics Playlist    • Engineering Mechanics Playlist   8. Power plant engineering play list    • Power Plant Engineering( Mechanical Branch...   9. Engineering Thermodynamics play list    • Thermodynamics / Thermal Engineering   Pla...   10. Heat and mass transfer play list    • Heat and Mass Transfer Playlist   11. Operation research play list    • Operation Research Playlist   12. Strength of material playlist    • Strength Of Materials Play list   13. Control Engineering/ Control systems engineering playlist    • Control Systems playlist ( EnTC & Mechanic...