Ohio Resource Center
Assessments
ODE Assessment Item, Grade 10: Bias in a Sample
Discipline
Mathematics
8, 9, 10
Professional Commentary

Students must recognize potential sources of bias in a survey or sampling situation and explain their answer. This short-answer question is a sample item used in the 2004 Ohio Graduation Test (see Overview of Ohio's Assessment System). The URL link (above) takes the user directly to the OGT test item (PDF), with access to performance data, complexity level of the item, a complete solution of the problem, and a scoring rubric. This OAT item is also available in MicrosoftÂ® Word. The Ohio Department of Education Instructional Management System website allows visitors to search for test items by subject and grade band and build a printable database of questions using the Add to Your Backpack function. ODE Reference Information: 2004 OGT for Mathematics, Annotated Item 39. (author/sw)

Ohio Mathematics Academic Content Standards (2001)
Data Analysis and Probability Standard
Benchmarks (8–10)
G.
Describe sampling methods and analyze the effects of method chosen on how well the resulting sample represents the population.
Mathematical Processes Standard
Benchmarks (8–10)
G.
Write clearly and coherently about mathematical thinking and ideas.
Principles and Standards for School Mathematics
Data Analysis and Probability Standard
Develop and evaluate inferences and predictions that are based on data
Expectations (6–8)
use observations about differences between two or more samples to make conjectures about the populations from which the samples were taken;