Kent State directory serv e was get ng corn la ts that norect pt ore rumte sw re

Question

Kent State directory serv e was get ng corn la ts that norect pt ore rumte sw re g er In heels Th upr at chose 10 days and examines all calls received on those days. The frequency of incorrect numbers green is recordod in the ta for each of the 10 days wrong tel. What control chart should be used? x-bar chart O R chart p-chart O c-chart QUESTION 10 What is the centerline for this SPC chart? 0 4 calls 5 calls 6 calls 7 calls QUESTION 11 What is the standard deviation for this SPC chart? 2.2361 Stop s Proctorio is sharing your screen. 2.4495

Explanation / Answer

9.

Note that 'defects' and not the 'defectives' are measured here. Also, there is no reference to the sample size and hence proportions for a p-chart cannot be computed.

So, the appropriate control chart will be a c-chart.

10.

The central line will be the average of all the errors = c_bar = (8+10+3+6+5+9+10+6+6+7) / 10 = 7 calls.

11.

Std. deviation (Sc) = SQRT(c_bar) = SQRT(7) = 2.646

12.

LCL = MAX(0, c_bar - 3 * Sc) = MAX(0, 7 - 3*2.646) = 0

13.

UCL = c_bar + 3 * Sc = 7 + 3*2.646 = 14.94

14.

None of the # of errors is more than UCL. So, the process is in control.

Related Questions

Navigate

• Browse (All)
• Browse K
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.