If Nothing Is Known About the Shape of a Distribution

question 132

Multiple Choice

If nothing is known about the shape of a distribution, what percentage of the observations fall within 2 standard deviations of the mean?

• A) at least 75%
• B) at most 25%
• C) approximately 95%
• D) approximately 5%

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Definitions:

Field Devices

Field devices refer to any electronic equipment or sensors located in the "field," or operational environment, that gather data or interact with physical processes.

On Instruction

A programming command used to activate or turn on a specific process, function, or device within a control system.

ONS

In PLC programming, ONS (One Shot) refers to an instruction that allows a specific operation to execute only once for each activation of its input condition.

Program Scan

The sequential process by which a programmable logic controller (PLC) checks its inputs, executes its programmed logic, and updates its outputs.