In a physical geography course, the average score on the first exam was 79 percent based on a sample of 48 students.This mean was calculated on the class grades to summarize overall performance.There are two other sections of the same class, but those students were not included in the calculation.The test average is a:
A) measure of variability.
B) statistic.
C) parameter.
D) mode.

Question

Quizplus · Accepted Answer

The test average is a statistic because it is a numerical summary of a sample of data (the 48 students in the physical geography course). A parameter, on the other hand, is a numerical summary of an entire population (which would include all students in all sections of the class). The mode is the most common score or value, and is not relevant in this context. A measure of variability would describe how spread out the scores are, and does not apply to the mean score.

In a Physical Geography Course, the Average Score on the First