Essay
Oil Quality and Price Quality of oil is measured in API gravity degrees--the higher the degrees API, the higher the quality. The table shown below is produced by an expert in the field who believes that there is a relationship between quality and price per barrel. A partial Minitab output follows:
{Oil Quality and Price Narrative} Estimate with 95% confidence the average oil price per barrel for an API degree of 35.
Correct Answer:

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12.768 ± (2.201)(0.1...View Answer
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