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:

Tail Recursive

A special form of recursion where the recursive call is the last operation in the function, allowing for optimization by some compilers.

Factorial Method

A function that calculates the product of an integer and all the integers below it; for example, 5 factorial (5!) is 5 x 4 x 3 x 2 x 1.

Directly Recursive

A function or method that calls itself within its own definition, directly creating a loop through recursion.

Recursive Method

A method in programming that calls itself in order to solve a problem.