Instruction 7.6 Online Customer Service Is a Key Element to Successful Online

question 113

Short Answer

Instruction 7.6
Online customer service is a key element to successful online retailing. According to a marketing survey, 37.5% of online customers take advantage of the online customer service. Random samples of 200 customers are selected.
-Referring to Instruction 7.6,90% of the samples proportions symmetrically around the population proportion will have between _________ % and _________ % of the customers who take advantage of online customer service.

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Definitions:

Global Variables

Variables that are accessible in any part of a program's code.

Java Language

A high-level, class-based, object-oriented programming language designed to have as few implementation dependencies as possible, used widely for building application software.

Instance Variable

A variable defined in a class for which each instantiated object of the class has a separate copy, or instance.

Local Variable

A variable that is declared within a block or method and is only accessible within that block or method.