Question

Use a median chart to determine if this process is centered.

See the Excel spreadsheet below. Data from the textbook has been entered.

Sample	Observation 1	Observation 2	Observation 3	Observation 4	Observation 5
1	8.06	7.93	8.19	8.45	8.32
2	8.06	8.06	8.06	8.19	8.32
3	8.19	7.67	8.06	8.32	8.19
4	6.89	6.63	6.89	6.63	6.89
5	7.93	8.58	8.19	8.06	8.32
6	8.06	8.06	8.06	8.06	8.06
7	7.54	7.41	7.67	9.36	6.76
8	8.19	7.67	8.06	8.32	8.19
9	8.19	7.67	8.06	8.32	8.19
10	9.62	9.62	9.23	9.49	9.23
11	8.06	8.19	8.06	8.19	8.06
12	8.32	8.19	8.06	7.93	7.93
13	8.19	8.32	8.06	8.19	7.93
14	7.93	7.93	7.93	7.93	7.93
15	8.19	8.32	7.93	8.19	7.93
16	8.32	8.06	8.32	8.06	8.06
17	8.06	8.32	8.19	8.32	8.06
18	7.93	8.06	8.19	8.32	8.45
19	8.06	7.93	7.93	7.93	7.93
20	8.32	8.19	8.06	8.45	8.19

Answer 1

Ans-

Step 1- Need to make the Frequency of observation

Frequency

6-7

7-8

8-9

9-10

Step 2- Count and the plat the observation into the frequency .

Step 3- Calculate the median from the formula bar

Median – 8.6

Step 4- Make the table as below

Step 4 Create the bar chart taking the median –

Yes, the Process is centered as the most of the observation between 8-9 and our median 8.6.