A Professor Grades 120 Research Papers and Reports That the Average

question 69

Multiple Choice

A professor grades 120 research papers and reports that the average score was 80%.What do we know about the sum of the differences of these 120 scores from their mean of 80%?

• A) The sum of the differences is minimal.
• B) The sum of the differences is 80%, the same as the mean.
• C) The sum of the differences is equal to zero.
• D) It is impossible to know without knowing each of the 120 scores.

---

Definitions:

Hispanic Female

A woman who identifies with a Spanish-speaking culture or heritage, often associated with countries from Latin America or Spain.

Sampling Bias

A bias in which certain members of a population are disproportionally represented in a sample, leading to inaccurate results.

Correlation Coefficient

A statistical measure that calculates the strength and direction of a linear relationship between two quantitative variables.

Statistical Measure

A quantifiable value used to summarize or describe a set of data.