When Two Variables Are Correlated,it Is Not Clear Which One

question 15

Multiple Choice

When two variables are correlated,it is not clear which one is a causal variable and which is an effect.This ambiguity reflects:

• A) the third variable problem
• B) random error
• C) selection bias
• D) the directionality problem

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Definitions:

Control Limits

These are the boundaries in a control chart, beyond which a process is considered to be out of control indicating an issue that needs investigation.

Average Range

The statistical measure representing the difference between the highest and lowest values in a set, divided by the number of observations.

Inspection Samples

Refers to a selection of items taken from a larger population and tested or inspected to determine the quality or performance of the whole.