CQIA Data Collection & Analysis Methods 2

Question 1

A quality team wants to track the frequency of defect types over a two-week period. Which data collection tool is MOST appropriate?

Accepted Answer

Check sheet

Answer

A check sheet is a structured form for collecting and tabulating data about defect frequencies over time.

Question 2

In a histogram, what does a bimodal distribution (two peaks) most likely indicate?

Accepted Answer

Two distinct populations or process shifts

Answer

A bimodal histogram typically indicates two distinct subpopulations or process conditions mixed in the data.

Question 3

Which of the following BEST describes stratification as a data analysis technique?

Accepted Answer

Separating data into subgroups to identify patterns

Answer

Stratification divides data into subgroups (e.g., by shift, machine, or operator) to reveal hidden patterns or causes.

Question 4

A Pareto chart is based on which underlying principle?

Accepted Answer

A vital few categories account for most of the problems

Answer

The Pareto principle states that roughly 80% of problems come from 20% of causes, guiding focus on the vital few.

Question 5

When constructing a scatter diagram, what does a data point cluster along a positive diagonal indicate?

Accepted Answer

A positive correlation between variables

Answer

Points clustering along a positive diagonal show that as one variable increases, the other tends to increase as well.

(CQIA) ASQ Certified Quality Improvement Associate Practice Test