A Large Software Company Gives Job Applicants a Test of Programming

question 34

Multiple Choice

A large software company gives job applicants a test of programming ability,and the mean for the test has been 160 in the past.One-hundred applicants are randomly selected from one large university and they produce a mean score of 163,with a standard deviation of 13.Is there enough evidence to indicate that the sample comes from a population with a mean score greater than 160?

• A)No.With a P-value of 0.9896,we fail to reject the null hypothesis of μ = 160.
• B)Yes.With a P-value of 0.0208,we reject the null hypothesis of μ = 160.
• C)Yes.With a P-value of 0.0104,we reject the null hypothesis of μ = 160.
• D)No.With a P-value of 0.9792,we fail to reject the null hypothesis of μ = 160.
• E)There is not enough information to perform the test.

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Definitions:

Contribution Margin Ratio

The ratio of contribution margin to sales revenue, used to measure the profitability and efficiency of a product or service.

Margin Of Safety

The difference between the actual or expected profitability of a project and the break-even point. It is a cushion against uncertainty.

Net Operating Income

The profit generated from a company's everyday operations, calculated by subtracting operating expenses from operating income.

Contribution Margin

The difference between sales revenue and variable costs of a product or service, indicating the amount contributing to covering fixed costs and generating profit.