The Number of Cell Phone Minutes Used by High School

question 111

Multiple Choice

The number of cell phone minutes used by high school seniors follows a normal distribution with a mean of 500 and a standard deviation of 50.What is the probability that a student uses fewer than 400 minutes?

• A)0
• B)0.023
• C)0.159
• D)0.977

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Definitions:

Total Fixed Cost

The aggregate of expenses that do not vary with changes in production levels or outputs.

Total Variable Cost

The total expenses that change in proportion to the production output or sales volume of a company.

Total Product

The overall quantity of output or goods produced by a firm or economy over a specific time period.