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

question 13

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 class width for this distribution

• A)is 9
• B)is 10
• C)is 39,which is: the largest value minus the smallest value or 39 - 0 = 39
• D)varies from class to class

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Definitions:

Significant Figures

The digits of a number that are meaningful in terms of accuracy or precision, important in scientific and mathematical calculations.

Percent

A part or other object per hundred, used in mathematics to describe how one quantity relates to another in terms of proportion or fraction.

Accurate

Definition: Precisely correct or exact in details.

Cent

The smallest denomination of currency in many countries, representing 1/100th of the basic unit of currency.