A Program Evaluator for a Large School District Wants to Know

question 54

Multiple Choice

A program evaluator for a large school district wants to know how much intelligence varies in the elementary schools.She selects one classroom at each grade level in each elementary school and administers an intelligence test to the children in those classrooms.In order to find out which school has the most consistent intelligence level, which of the following should she calculate for each school?

• A)The mean
• B)The standard deviation
• C)The sum of the deviations
• D)The range

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Definitions:

Normally Closed

Refers to a switch or relay that is in a closed (conducting) state when not energized.

Contact Configurations

The arrangement and specification of contacts within electrical devices, defining their operational functionalities.

Contactor

An electrically controlled switch used for switching an electrical power circuit, commonly used in motor and lighting applications.

Energized

A term used to describe when an electrical component or circuit has voltage applied and is functioning or ready to function.