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

question 63

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 relative frequency of students working 9 hours or less

• A)is 20
• B)is 100
• C)is 0.95
• D)0.05

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Definitions:

Occurrences

Events or instances of something happening or being present.

Interval

A range of values in statistics that describes the difference between two points, often used in the classification of scales of measurement.

Random Variable

A variable whose values depend on outcomes of a random phenomenon, with each outcome associated with a different value or set of values.