Suppose That, on Average, Electricians Earn Approximately µ = $54,000

question 74

Multiple Choice

Suppose that, on average, electricians earn approximately µ = $54,000 per year in the United States. Assume that the distribution for electricians' yearly earnings is normally distributed and that the standard deviation is σ = $12,000. What is the probability that the average salary of four randomly selected electricians exceeds $60,000?

• A) 0.1587
• B) 0.3085
• C) 0.6915
• D) 0.8413

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Definitions:

Positive Correlation

A relationship between two variables in which both variables move in the same direction.

Decreases

Refers to a reduction or decline in the magnitude or value of a certain variable or quantity.

Decreases

A term indicating a reduction or decline in value, quantity, or extent.

Correlation Coefficients

Statistical measures that indicate the strength and direction of the relationship between two or more variables.