Kunci Jawaban MO TN 8

6.

Sample	1	2	3	4	mean	range
1	1010	991	985	986	993.00	25
2	995	996	1009	994	998.50	15
3	990	1003	1015	1008	1004.00	25
4	1015	1020	1009	998	1010.50	22
5	1013	1019	1005	993	1007.50	26
6	994	1001	994	1005	998.50	11
7	989	992	982	1020	995.75	38
8	1001	986	996	996	994.75	15
9	1006	989	1005	1007	1001.75	18
10	992	1007	1006	979	996.00	28
11	996	1006	997	989	997.00	17
12	1019	996	991	1011	1004.25	28
13	981	991	989	1003	991.00	22
14	999	993	988	984	991.00	15
15	1013	1002	1005	992	1003.00	21

 999.1, = 21.733

Control limits for X-bar chart:

UCL, LCL = , = 999.1 + .73(21.733) = 1014.965, 983.235

Control limits for R chart:

UCL  =  = 2.28(21.7333) = 49.551

LCL =  = 0(21.7333) = 0.00

           

The process is in statistical control.

8.   

a.     = .06

= .0075

UCL =  + 2 =  .06 + 2(.0075) = .075

LCL =  - 2 =  .06 - 2(.0075)  = .045

b.    The chart indicates that the process is out of control.  The administrator should investigate the quality of the patient meals.

13.  

a.

         = .333

b.    No, the machine is not capable of producing the part at the desired quality level.