If the Mean of a Normal Distribution Is Negative

question 85

Multiple Choice

If the mean of a normal distribution is negative,

• A)the standard deviation must also be negative
• B)the variance must also be negative
• C)a mistake has been made in the computations, because the mean of a normal distribution cannot be negative
• D)None of these alternatives is correct.

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Definitions:

Compressors

Mechanical devices that increase the pressure of a gas by reducing its volume, commonly used in air conditioning, refrigeration, and pneumatic applications.

Start Capacitor

A temporary capacitor that increases the starting torque of a motor by introducing a leading current to the auxiliary winding.

Auxiliary Winding

A secondary winding in a motor or transformer used to provide additional electrical pathways or support the main winding.

Locked-Rotor Starting

A method of starting electric motors where the rotor is prevented from turning initially, causing high starting torque and current.