Refer to Exercise 16.44. The numbers of alignment errors observed for each of the next 25 aircraft produced are shown in the table below.

a. Add these 25 points to the c-chart of Exercise 16.44. Does the process still appear to be in control?

b. Conduct a runs analysis for the revised c-chart. What do you detect?

Data from Exercise 16.44    

A certain airplane model is susceptible to alignment errors in the manufacturing process. To monitor this process, the total number of alignment errors observed at final inspection for each of the first 25 aircraft produced were recorded, as shown in the table, right column.

Transcribed Image Text:

AIRALIGN Number of Number of Airplane Alignment Errors Airplane Alignment Errors 1 7 14 9 2 6 15 8 16 15 4 17 6. 4 18 4 6 7 19 13 7 8 20 7 8 12 21 8 22 15 10 9 23 6 11 8 24 6. 12 5 25 10 13 00 in