EngData_Mod1_Quiz

What is the primary goal of engineering statistics?

• To replace mathematical theory
• To provide principles for gathering and analyzing data
• To eliminate variability in systems
• To avoid using experiments

In engineering statistics, what does variability refer to?

• Differences in system design
• Differences in measurements or observations
• Lack of proper equipment
• Inaccurate mathematical models

Which type of statistical study involves actively changing process variables?

• Observational
• Experimental
• Enumerative
• Analytical

Observational studies are generally:

• Faster and more reliable
• Time-consuming and less controlled
• Always more accurate
• Less prone to lurking variables

Which type of study focuses on a specific, finite population?

• Analytical
• Enumerative
• Experimental
• Observational

In data classification, which is an example of qualitative data?

• Mass of a pellet
• Rockwell hardness value
• Classification of a part as scrap or conforming
• Length of a metal rod

Continuous data can:

• Only take whole number values
• Take any value within a range
• Only be classified into categories
• Never be used in experiments

Which is preferred for more informative statistical analysis?

• Categorical data
• Measurement data
• Count data
• Observational data

In bivariate data, measurements are taken:

• On two separate samples
• On the same sample for two variables
• From unrelated populations
• Only in enumerative studies

Which term refers to the property of a measurement system matching a standard?

• Precision
• Accuracy
• Validity
• Reliability