TABLE 2-5
The following are the duration in minutes of a sample of long-distance phone calls made within the continental United States reported by one long-distance carrier. 
-Referring to Table 2-5, if 100 calls were randomly sampled, how many calls lasted 15 minutes or longer?
Definitions:
Communication Channel
The medium through which information is transmitted from a sender to a receiver, such as spoken words, written text, or digital media.
Formal Presentation
A structured delivery of content to an audience, often using tools like slides or a script, in a professional setting.
Presentation Method
A technique or approach used to convey information to an audience, often involving visuals, speech, and other multimedia elements.
Introduction
The initial section of a document or speech that sets the stage for the main content, presenting the topic and its relevance.
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