A school board is studying how test scores vary by socio- economic levels. The data represent information observed in 2007. The most effective way of depicting the data is a
A) trending- line graph.
B) cross- section graph.
C) one- variable graph.
D) time- series graph.

Question

Quizplus · Accepted Answer

Since the school board is studying how test scores vary by socio-economic levels, the most effective way of depicting the data would be a cross-section graph. A cross-section graph is used to compare data from different groups or categories at a specific point in time, such as comparing test scores of students in different socio-economic levels in 2007. A trending-line graph would not be appropriate as there is no need to show changes over time. A one-variable graph would not be sufficient as we are comparing two variables (test scores and socio-economic levels). A time-series graph would not be appropriate as it is used to show changes in one variable over time, and we do not need to analyze changes in socio-economic levels over time in this case.

A School Board Is Studying How Test Scores Vary by Socio-