Please explain and answer the following questions:

1. Statistical process control (SPC) is based on 100% inspection of the output of production processes.

True or False

2. Which statement concerning setting up control charts is not true?

a. Using wider limits (e.g. +/- 3 Sigma limits) reduces the probability of a Type I error

b. Sample statistics that fall inside control limits indicate random variation only

c. Sample statistics outside control limits indicate assignable causes of variation

d. Control limits are set based on design specifications

3.When analyzing an R-chart a plot point is found outside the UCL. What does this indicate?

a. An increase in variability

b. A decrease in variability

c. A shift in the central tendency of the process

d. The process is in control.

4. Which of the following is an example of a non-random control chart pattern?

a. Trend

b. Level shift

c. Bias

d. All of the prior options are examples of non-random patterns.

5. What quality control method attempts to increase the accuracy of a process by adjusting levels of factors that could influence process variation?

a. Continuous improvement

b. Six sigma

c. Capability analysis

d. Design of experiments

6. The range chart (R-chart) is most likely to detect a change in:

a. proportion.

b. mean.

c. number defective.

d. process variability.

e. sample size.