Question 1

Which of the following control charts is used to monitor the proportion of defective items within a sample?

Accepted Answer

The answer of Which of the following control charts is...

Question 2

Which of the following control charts is used to control the variation within samples?

Accepted Answer

The answer of Which of the following control charts is...

Question 3

To monitor the number of blemishes on a polished surface, a company randomly selects 10 units of output from its process and counts the number of blemishes on each unit. The sample results are shown below:  Given the sample information above, the average number of defects per unit for this process would be

Accepted Answer

The answer of To monitor the number of blemishes on...

Question 4

To monitor the number of blemishes on a polished surface, a company randomly selects 10 units of output from its process and counts the number of blemishes on each unit. The sample results are shown below:  Given the sample information above, the standard deviation of the number of defects for this process would be

Accepted Answer

The answer of To monitor the number of blemishes on...

Question 5

A company randomly selects 100 light bulbs every day for 40 days from its production process. If 600 defective light bulbs are found in the sampled bulbs then the 3-sigma lower control limit would be

Accepted Answer

The 3-sigma lower control limit for a proportion cannot be negative, so it is set to 0.00.

Question 6

If ?σ is the population standard deviation, k the number of samples or subgroups, and n the sample size (number of observations in each subgroup), what is the distance from the centre line to the upper control limit?

Accepted Answer

The distance from the center line to the upper control limit in a control chart is typically 3 standard deviations of the sample mean, which is calculated as 3σ/√n, where n is the sample size.

Question 7

If the quality of a process's output is determined by the average value of a sample, use a(n) ___ control chart.

Accepted Answer

The answer of If the quality of a process's output...

Question 8

If a sample of 40 units of output found 500 defects, then the 3-sigma upper control limit for the  chart would be

Accepted Answer

The answer of If a sample of 40 units of...

Question 9

A control chart that reflects the amount of dispersion, or spread, present within each sample is known as a(n)

Accepted Answer

The answer of A control chart that reflects the amount...

Question 10

If the quality of a process's output is determined by the number of defects within a small sample, use a(n) ___ control chart.

Accepted Answer

The answer of If the quality of a process's output...

Question 11

Which of the following control charts is used to control the variation between samples?

Accepted Answer

The answer of Which of the following control charts is...

Question 12

In general, a process is considered to be in control for all the following conditions except

Accepted Answer

A process is considered in control when points are randomly distributed around the center line, not when all points are significantly above it, which indicates a potential shift in the process.

Question 13

Which of the following control charts are based on sample sizes as small as one?

Accepted Answer

The answer of Which of the following control charts are...

Question 14

Which of the following control charts is based on the number of defects within a sample?

Accepted Answer

The answer of Which of the following control charts is...

Question 15

A company randomly selects 100 light bulbs every day for 40 days from its production process. If 600 defective light bulbs are found in the sampled bulbs then the estimate for the process average defective would be

Accepted Answer

The estimate for the process average defective can be found by dividing the total number of defective bulbs by the total number of sampled bulbs.

Total number of sampled bulbs = 100 x 40 = 4000 
Total number of defective bulbs = 600

Process average defective = Total number of defective bulbs / Total number of sampled bulbs

Process average defective = 600 / 4000 = 0.15

Therefore, the best choice is C.

Question 16

Consider the number of patient falls per day in a hospital. Which of the following control charts is most applicable in this case?

Accepted Answer

The answer of Consider the number of patient falls per...

Question 17

If the quality of a process's output is determined by classifying the output as being defective or not defective, use a(n) ___ control chart.

Accepted Answer

The answer of If the quality of a process's output...

Question 18

If the quality of a process's output is determined by the difference between the largest and smallest values in a sample, use a(n) ___ control chart.

Accepted Answer

The answer of If the quality of a process's output...

Question 19

Which of the following control charts are often based on sample sizes larger than one hundred?

Accepted Answer

The answer of Which of the following control charts are...

Question 20

Which of the following charts are frequently used together to monitor and control quality?

Accepted Answer

The answer of Which of the following charts are frequently...

Quiz 3: Statistical Process Control

Which of the following control charts is used to monitor the proportion of defective items within a sample?

Which of the following control charts is used to control the variation within samples?

A company randomly selects 100 light bulbs every day for 40 days from its production process. If 600 defective light bulbs are found in the sampled bulbs then the 3-sigma lower control limit would be

If ?σ is the population standard deviation, k the number of samples or subgroups, and n the sample size (number of observations in each subgroup) , what is the distance from the centre line to the upper control limit?

If the quality of a process's output is determined by the average value of a sample, use a(n) ___ control chart.

If a sample of 40 units of output found 500 defects, then the 3-sigma upper control limit for the chart would be

A control chart that reflects the amount of dispersion, or spread, present within each sample is known as a(n)

If the quality of a process's output is determined by the number of defects within a small sample, use a(n) ___ control chart.

Which of the following control charts is used to control the variation between samples?

In general, a process is considered to be in control for all the following conditions except

Which of the following control charts are based on sample sizes as small as one?

Which of the following control charts is based on the number of defects within a sample?

A company randomly selects 100 light bulbs every day for 40 days from its production process. If 600 defective light bulbs are found in the sampled bulbs then the estimate for the process average defective would be

Consider the number of patient falls per day in a hospital. Which of the following control charts is most applicable in this case?

If the quality of a process's output is determined by classifying the output as being defective or not defective, use a(n) ___ control chart.

If the quality of a process's output is determined by the difference between the largest and smallest values in a sample, use a(n) ___ control chart.

Which of the following control charts are often based on sample sizes larger than one hundred?

Which of the following charts are frequently used together to monitor and control quality?