US Smartphone Owners Aged 18 to 24 Send an Average

question 70

Multiple Choice

US smartphone owners aged 18 to 24 send an average of 2,022 text messages per month (Source: Businessinsider.com, 2013) .Suppose that the random variable "monthly text messages sent" is normally distributed.If exactly 20 percent of smartphone owners aged 18 to 24 send 3000 or more texts per month, what is the standard deviation of the random variable "monthly test messages sent"?

• A)404
• B)978
• C)1,164
• D)1,881
• E)2,196

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Definitions:

Rightful Dissolution

The legally justified process of formally ending the existence of an entity, such as a corporation or partnership.

Managing Partner

A member of a partnership who is responsible for its day-to-day operations and has the authority to make managerial decisions.

Actual Authority

The power that an agent or representative is formally granted by a principal or entity to conduct business on their behalf.

Dissolved

Refers to the process of a substance becoming incorporated into a liquid, resulting in a solution.