Project #9249 - Business Statistics

Can someone help me solve it please? :)

 

Below is a sample mean, but we must calculate the standard deviation and illustrate the ranges.  Use the example cited to extrapolate what 1SD, 2SD and 3SD looks like. Please show all calculations. 

In the chart below there is an upper-control(350) and lower-control limit (200) with a sample mean at The first 260.  The sample taken for units 1-15 were within the acceptable range for the mean; however, units 18-24 were above the acceptable control so management must stop the manufacturing process and examine factors such as those listed above and make adjustments to the process.  The statistical process control should focus on the process rather than on the end product because if the process is kept in control, the manufacturer knows what to expect in the finished monitors. 

                                         COMPUTER MONITOR MANUFACTURING

                                400 –                                                        *      

                                                                                      *    *                            

                                350 –  UCL- - - - - - - - - - - - - - - - - - - - - - - - -

                                                                                  *       

                                300 –        *       *                *

Sample Mean                       __________________________________

                                250 –            *    

                                                                 *    *  

                                200 –  LCL- - - - - - - - - - - - - - - - - - - - - - - - --  

 

                                150 –

                                                1   3   6   9   12   15   18   21   24   

                                                Sample Number (monitors)

 

                               UCL – Upper Control

                               LCL – Lower Control

 

Subject Mathematics
Due By (Pacific Time) 07/16/2013 10:09 pm
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