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a?.0 ?16% D i Chrome File Edit View History Bookmarks People Window Help ? ? connect ? > C Secure https://newconnect.mheducation.com/flow/connect.html Sat 3:59 AM Hw5 - Chapter 13 Saved Help Save & Exit Submit Check my work 2 A shirt manufacturer buys cloth by the 100-yard roll from a supplier. For setting up a control chart to manage the irregularities (e.g. loose threads and tears), the following data were collected from a sample provided by the supplier. 3 SAMPLE 10 IRRBGULARITIES points a. Determine the , UCL and LCL for a c-chart. (Round your answers to 2 decimal places.) c-bar = LCL= eBook Hint Print b. Suppose the next five rolls from the supplier had three, two, five, three, and seven irregularities. Is the supplier process under control? Hint: don't recalculate the control limits, just indicate if these samples are within the control limits you have already calculated. O Yes No Pre of 4Next > Graw

Explanation / Answer

A.

C-Bar (C) = total number of irregularities / total number of sample =

C-Bar (C) = 43/10 = 4.3

UCL = C + 3*(c)^.5 = 4.3 + 3*(4.3)^.5

UCL = 10.52

LCL = C - 3*(c)^.5   = 4.3 - 3*(4.3)^.5

LCL = -1.92

B.

Correct Answer:

Yes

Supplier process is under control as all the irregularities in the coming sample is within the UCL and LCL as calculated above.

Sample Irregularities 1 3 2 5 3 2 4 6 5 5 6 4 7 6 8 3 9 4 10 5 C-bar= 43/10 = 4.3

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