The Weekly Mean Income of a Group of Executives Is

question 49

Multiple Choice

The weekly mean income of a group of executives is $1,000 and the standard deviation of this group is $100. The distribution is normal. What percent of the executives have an income of $925 or less?

• A)About 15%
• B)About 85%
• C)About 50%
• D)About 23%

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Definitions:

Valence Shell

Outermost orbital shell in an atom. The number of electrons in the valence plays a role in defining the electrical and physical characteristics of an element.

Chemical Properties

Characteristics of a substance that dictate how it reacts with other substances to form new products.

Electrical Resistance

The measure of the difficulty electrons face in flowing through a conductor, resulting in heat generation and energy dissipation.

Sectional Area

Sectional area refers to the area of a particular cross-section of a material or structural element, significant in physics and engineering for calculating stress, resistance, and other material properties.