Exhibit 2-10

question 92

Multiple Choice

Exhibit 2-10.Automobiles traveling on a road with a posted speed limit of 65 miles per hour are checked for speed by a state police radar system.The following table is a frequency distribution of speeds. Refer to Exhibit 2-10.When using a polygon to graph quantitative data,what does each point represent?

• A)The lower limit of a particular class and its width
• B)The midpoint of a particular class and its associated frequency or relative frequency
• C)The midpoint of a particular class and its associated cumulative frequency or cumulative relative frequency
• D)The upper limit of a particular class and its associated cumulative frequency or cumulative relative frequency

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Definitions:

High Leg

In electrical systems, a term referring to a conductor in a delta connection that has a higher voltage with respect to ground than the other two conductors.

Open Delta

A transformer connection method using two transformers to form a delta configuration, typically used when one transformer of a three-phase system is out of service or for economy in a lightly loaded system.

Single-Phase Loads

Equipment that operates on a single alternating current (AC) power phase, usually seen in residential and light commercial settings.

High Leg

In electrical systems, a conductor within a delta configuration that carries higher voltage to ground than the other conductors.