Exhibit 2-1 The Numbers of Hours Worked (Per Week)by 400 Statistics Students

question 59

Multiple Choice

Exhibit 2-1
The numbers of hours worked (per week) by 400 statistics students are shown below.

-Refer to Exhibit 2-1.The cumulative relative frequency for the class of 20 - 29

• A)is 300
• B)is 0.25
• C)is 0.75
• D)is 0.5

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Definitions:

Query Tools Design

Refers to the conceptual and practical process of creating tools for querying databases or information systems.

Query Design Grid

A graphical interface in database systems allowing users to specify criteria for selecting, sorting, and displaying data.

Null Field Values

A condition where a database field does not contain any data, representing the absence of a value.

Is Null

A condition or expression used in databases to check for missing or empty values.