A Student Asked a Statistics Professor If Grades Were Marked

question 13

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.

Using the data from this Megastat printout, you determine:

• A) the letter grades are evenly distributed when tested at the 0.05 level of significance.
• B) the letter grades are not normally distributed when tested at the 0.01 level of significance.
• C) the letter grades are normally distributed when tested at the 0.05 level of significance.
• D) the letter grades are not normally distributed when tested at the 0.05 level of significance.
• E) the letter grades are not normally distributed when tested at either the 0.01 or 0.05 level of significance.

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Definitions:

Oligopolists

Firms or entities that operate in an oligopoly, a market structure characterized by a small number of sellers that dominate the market.

R&D

Stands for Research and Development, which refers to investigative activities a business conducts to improve existing products and procedures or to lead to the development of new products and procedures.

Economic Profit

The difference between total revenue and total costs, including both explicit and implicit costs, representing the actual profitability of a company beyond just its accounting profits.

Inverted-U Theory

A hypothesis suggesting that a relationship between two variables follows an upside-down U shape, often applied to the correlation between productivity and stress levels.