A Student Asked a Statistics Professor If Grades Were Marked

question 7

Multiple Choice

A student asked a statistics professor if grades were marked "on the curve." The professor decided to give the student a project to determine if last year's statistics grades were normally distributed. The professor told the student that last year's mean mark was 70 with a standard deviation of 10 and to use the following results. What is the alternative hypothesis?

• A) The letter grades are evenly distributed.
• B) The letter grades are not evenly distributed.
• C) The letter grades are normally distributed.
• D) The letter grades are not normally distributed.
• E) The letter grades are unfairly distributed.

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Definitions:

Repetitive Decisions

Decisions that occur regularly, requiring a consistent approach or strategy to manage typical situations or processes.

Financial Impact

Describes the effect of a business event or decision on a company's financial health, often measured in terms of revenues, expenses, or profits.

Expected Value

The anticipated value of a variable, calculated as the sum of all possible values each multiplied by the probability of its occurrence.

Guaranteed Amount

A certain sum of money promised to an individual or entity under specific conditions or agreements.