Question

MULTIPLE CHOICE PLEASE MAKE SURE OF ANSWER 8. Control Charts for Slow Processes 1 point possible...

MULTIPLE CHOICE

PLEASE MAKE SURE OF ANSWER

8. Control Charts for Slow Processes

1 point possible (graded)

The usage of which of the following charts is suggested for slow moving processes according to the lecture?

A- R chart

B- X chart

C- X-bar chart

9. MA and MR Charts 1

1 point possible (graded)

Which of the following statements about moving average (MA) and moving range (MR) charts is NOT correct?

A- Moving average (MA) and MR charts use sample averages and sample ranges, as do the regular X- and R-charts, but the method of forming the samples or subgroups is different.

B- The averaging done in the MA and MR charts reduces the noise and helps in discovering the signals.

C- The averaging done in the MA and MR charts always increases noise – independent of the sample size – and makes discovering the signals more difficult.

10. MA and MR Charts 2

1 point possible (graded)

Which of the following statements about the impact of the size of subgroups for moving average (MA) and moving range (MR) charts is correct?

A- Larger subgroups smooth variations and thus help to detect changes.

B- Smaller subgroups are more responsive and less sensitive to noise.

C- Larger subgroups smooth variations but may hide changes.

11. EWMA-Chart

1 point possible (graded)

Which of the following statements about the EWMA-Chart is correct?

A- The EWMA charts is a chart whose sensitivity or power can be changed by changing the value of lambda.

B- EWMA is an abbreviation for Estimated Weighted Moving Average.

C- The EWMA charts is a chart whose sensitivity or power cannot be changed.

12. S-Chart

1 point possible (graded)

Which of the following statements about the S-Chart is NOT correct?

A- An S-chart (standard deviation chart) is used instead of R-chart when the sample size has to be small, because the R-chart loses in efficiency when the sample size becomes small, n smaller 10.

B- An S-chart (standard deviation chart) is used instead of R-chart when the sample size has to be large, because the R-chart loses in efficiency when the sample size becomes large, n larger 10.

C- Sometimes we need large sample size due to dictated circumstances, such as when extra sensitivity through a larger sample size is desired. Then, the S-chart should be used in place of the R-chart to accompany the X-bar chart.

Homework Answers

Answer #1

8. D- MA and MR charts

These charts are used when the process is too slow to produce sufficient data for grouping to be feasible.

9. C- The averaging done in the MA and MR charts always increases noise – independent of the sample size – and makes discovering the signals more difficult.

10. B- Smaller subgroups are more responsive and less sensitive to noise.

11. A- The EWMA charts is a chart whose sensitivity or power can be changed by changing the value of lambda.

12. A- An S-chart (standard deviation chart) is used instead of R-chart when the sample size has to be small, because the R-chart loses in efficiency when the sample size becomes small, n smaller 10.

Know the answer?
Your Answer:

Post as a guest

Your Name:

What's your source?

Earn Coins

Coins can be redeemed for fabulous gifts.

Not the answer you're looking for?
Ask your own homework help question
Similar Questions
ADVERTISEMENT
Need Online Homework Help?

Get Answers For Free
Most questions answered within 1 hours.

Ask a Question
ADVERTISEMENT