A Professor at a Local University Noted That the Grades

question 68

Short Answer

A professor at a local university noted that the grades of her students were normally distributed with a mean of 78 and a standard deviation of 10.
a.The professor has informed us that 16.6% of her students received grades of A. What is the minimum score needed to receive a grade of A?
b.If 12.1% of her students failed the course and received Fs, what was the maximum score among those who received an F?
c.If 33% of the students received grades of B or better (i.e., As and Bs), what is the minimum score of those who received a B?

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Definitions:

Appraisal Cost

Expenses related to the evaluation and inspection of products and services to ensure they meet quality standards and are defect-free.

Quality Cost Report

A document that details the costs associated with ensuring the quality of a product or service.

Final Product Testing

The process of verifying that a product meets the required specifications and quality standards before it is delivered or sold.

External Failure Cost

Expenses related to product or service failures detected by the customer, including returns, repairs, and warranty claims.