A Mining Company Made Some Changes to Their Mining Process

question 32

Essay

A mining company made some changes to their mining process in an attempt to save fuel. Before the changes were made, it took an average of 20 gallons of diesel fuel to mine 1,000 pounds of copper. Suppose the standard deviation of fuel used per 1,000 pounds of copper mined is 6 gallons. After the changes were made, the company only used an average of 18 gallons of diesel for the next 30,000 pounds of copper mined.
A) How unusual would it be to get a sample average of 18 gallons or less for 30,000 pounds of copper mined if the changes to the mining process had no effect?
B) Do you think the changes in the mining process actually lowered the fuel used? Explain.

• A) How unusual would it be to get a sample average of 18 gallons or less for 30,000 pounds of copper mined if the changes to the mining process had no effect?
• B) Do you think the changes in the mining process actually lowered the fuel used? Explain.

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Definitions:

Psychoanalysis

A therapeutic approach and theory of psychology developed by Sigmund Freud that emphasizes unconscious motives and conflicts.

Sigmund Freud

An Austrian neurologist known as the founding father of psychoanalysis, a method for treating psychopathology through dialogue between a patient and a psychotherapist.

Critical Thinking

The objective analysis and evaluation of an issue in order to form a judgment.

Vague Recollection

A memory that is not clear or detailed but is rather indistinct or fuzzy.