The control limits in a control chart can be interpreted to mean:
A) any value falling outside the limits is a defect and the product should be discarded.
B) the range of virtually all special cause variation.
C) any value falling within the limits means the product is high quality.
D) the range of virtually all common cause variation.
Q. 2The main process change that can be detected with a process control chart is:
A) the process average has shifted up or down from normal.
B) the process average is trending up or down from normal.
C) the process is behaving in such a manner that the existing variation is not random in nature.
D) All of the above
Q. 3It is believed that number of people who attend a Mardi Gras parade each year depends on the temperature that day.
A regression has been conducted on a sample of years where the temperature ranged from 28 to 64 degrees and the number of people attending ranged from 8400 to 14,600. The regression equation was found to be y = 2378 + 191x. Which of the following is true?A) The average change in parade attendance is an additional 2378 people per one-degree increase in temperature.
B) The average change in parade attendance is an additional 191 people per one-degree increase in temperature.
C) If the temperature is 75 degrees, we can expect that 16,703 people will attend.
D) If the temperature is 0 degrees this year, then we should expect 2378 people to attend.
Q. 4Which of the following time-series components is almost always present in sales data for electronics companies?
A) Random
B) Trend
C) Seasonal
D) All of the above
Q. 5Which of the following is true about index numbers? Index numbers are:
A) used to measure the trend component.
B) used to measure the seasonal component.
C) used to measure the cyclical component.
D) used to make a relative comparison of different time periods.
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