A Consumer Group Would Like to Estimate the Mean Monthly

question 122

Multiple Choice

A consumer group would like to estimate the mean monthly electricity charge for a single family house in July (within $5) using a 99 percent level of confidence. Based on similar studies the standard deviation is estimated to be $20.00. How large a sample is required?

• A) 105
• B) 106
• C) 107
• D) 108
• E) 109

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Definitions:

Command Button Wizard

A tool in software development environments that guides users through the creation of command buttons, including their functions and linked procedures.

Option Buttons

Controls in a graphical user interface that allow users to select one option from a pre-defined set, often represented graphically as radio buttons.

Option Group

A set of related options within a user interface that allows users to select one of several choices.

Record Source

The data source or database table that provides the records for a form, report, or query in a database application.