A Coal Company Wants to Determine a 95% Confidence Interval

question 62

Short Answer

A coal company wants to determine a 95% confidence interval estimate for the average daily tonnage of coal that they mine. Assuming that the company reports that the standard deviation of daily output is 200 tons, how many days should they sample so that the margin of error will be 39.2 tons or less?

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Definitions:

Problem Behavior

Refers to actions or behaviors that are challenging or disruptive, often considered socially unacceptable or inappropriate.

Delinquency

Involvement in minor crime, especially by young people.

Sexual Activity

Behaviors that involve the sexual organs and are often carried out for physical pleasure, reproduction, or emotional bonding.

Oral Sex

A form of sexual activity where the genitals are stimulated by the partner's mouth, lips, or tongue.