A Student Answers 26 Questions Correctly

question 141

Multiple Choice

A student answers 26 questions correctly.Is that enough to convince you that he is not merely guessing? Explain.

• A)No; if the student were guessing,we would expect him to answer 15 questions correctly with a standard deviation of 11.25.26 is 0.98 standard deviations above the expected value.That would not be an unusual result.
• B)Yes; if the student were guessing,we would expect him to answer 15 questions correctly with a standard deviation of 3.10.26 is 3.5 standard deviations above the expected value.That would be an unusual result.
• C)Yes; if the student were guessing,we would expect him to answer 15 questions correctly with a standard deviation of 3.35.26 is 3.3 standard deviations above the expected value.That would be an unusual result.
• D)Yes; if the student were guessing,we would expect him to answer 15 questions correctly with a standard deviation of 3.87.26 is 2.8 standard deviations above the expected value.That would be an unusual result.
• E)No; if the student were guessing,we would expect him to answer 15 questions correctly with a standard deviation of 3.35.26 is 3.3 standard deviations above the expected value.That would not be an unusual result.

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Definitions:

Standardization

The process of developing and implementing technical standards to maximize compatibility, safety, repeatability, or quality.

Product Life Cycle

The sequence of stages from introduction to growth, maturity, and decline through which a product goes over its lifespan.

Retirement

The act of leaving one's job and ceasing to work, typically upon reaching a certain age or due to health reasons.

Cost Minimization

A strategy aiming to reduce expenses as much as possible while maintaining desired levels of production, quality, and service.