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:

Psychopathology

The scientific study of mental disorders, encompassing their symptoms, causes, and treatments.

Conditioned Stimulus

A previously neutral stimulus that, after being paired with an unconditioned stimulus, comes to trigger a conditioned response.

Unconditioned Stimulus

A stimulus that naturally and automatically triggers a response without prior conditioning.

Backward Conditioning

A less common form of classical conditioning where the unconditioned stimulus is presented before the conditioned stimulus.