Which of the Following Must Be True in Order to Calculate

question 22

Multiple Choice

Which of the following must be true in order to calculate the Pearson correlation coefficient?

• A) The x variable must be interval or ratio scale of measurement.
• B) The y variable must be interval or ratio scale of measurement.
• C) The data must appear to be linear.
• D) All of the above.

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Definitions:

DC Average

The average value of a direct current (DC) over a period of time, often used to describe power or signal levels.

Positive Pulses

Electrical signals that transition from a lower to a higher voltage level, typically representing a binary '1' in digital circuits.

Speed Regulation

A comparison of a motor’s speed between no load and full load.

DC Motor

A motor that runs on direct current electricity, converting electrical energy into mechanical rotation with variations like brushless or brushed types.