Each hour, a 10 m2 section of fabric is inspected for

Chapter 10, Problem 8E

(choose chapter or problem)

Each hour, a 10 \(\mathrm m^2\) section of fabric is inspected for flaws. The numbers of flaws observed for the last 20 hours are as follows:

                      38  35  35  49  33  48  40  47  45  46

                      41  53  36  41 51   63  35  58  55  57

a. Compute the upper and lower \(3\sigma\) limits for a c chart.

b. Is the process in control? If not, when is it first detected to be out of control?

Equation Transcription:

Text Transcription:

m^2

3{sigma}