Gold Miners in Alaska Have Found, on Average, 12 Ounces

question 28

Multiple Choice

Gold miners in Alaska have found, on average, 12 ounces of gold per 1,000 tons of dirt excavated with a standard deviation of 3 ounces. Assume the amount of gold found per 1,000 tons of dirt is normally distributed. If the miners excavated 1,000 tons of dirt, how little gold must they have found such that they find that amount or less only 15% of the time?

• A) −1.04
• B) 1.04
• C) 8.89
• D) 15.12

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Definitions:

New Ways

Innovative methods or approaches to addressing challenges or problems.

Old Ideas

Concepts, beliefs, or practices that have been prevalent in the past but may not be considered current or innovative.

Descriptive Statistics

Statistics that summarize or describe the characteristics of a data set, including measures like mean, median, and mode.

Inferential Statistics

A branch of statistics that makes predictions or inferences about a population based on a sample of data drawn from that population.