The Average Monthly Electric Bill of a Random Sample of 256

question 65

Short Answer

The average monthly electric bill of a random sample of 256 residents of a city is $90. The population standard deviation is assumed to be $24.
a.Construct a 90% confidence interval for the mean monthly electric bills of all residents.
b.Construct a 95% confidence interval for the mean monthly electric bills of all residents.

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Definitions:

Leadership Positions

Roles within an organization that entail guiding, directing, and influencing the work and behavior of others.

Indirect Message

Communication that implies or suggests the main point rather than stating it explicitly, often used to soften negative news or requests.

Sender's Position

The title or role of the individual sending an email or correspondence, indicating their level of authority or perspective.

Successful Communication

The effective exchange of information where the intended message is accurately understood by the recipient.