When Comparing Two Population Variances, We Use the Difference $\sigma _ { 1 } ^ { 2 } - \sigma _ { 2 } ^ { 2 }$

question 11

True/False

When comparing two population variances, we use the difference $\sigma _ { 1 } ^ { 2 } - \sigma _ { 2 } ^ { 2 }$ rather than the ratio $\sigma _ { 1 } ^ { 2 } / \sigma _ { 2 } ^ { 2 }$ .

---

Definitions:

Sufficient Power

Sufficient power refers to the minimum amount of energy required to properly operate a device or system according to its specifications.

Revolving-armature-type

Pertains to a design of electric machines where the armature, carrying the electrical input or output, rotates while the magnetic field source is stationary.

Rotating Part

A component that moves around a central axis within a machine or device, typically found in motors and generators.

Rotor

The rotating member of an AC machine.