Final answer:
The reliability being tested in this scenario is the test-retest reliability, which measures the consistency of measurements over time. Option A
Step-by-step explanation:
Based on the information provided, the test of reliability being conducted in this case is the test-retest reliability. Test-retest reliability refers to the consistency of measurements when the same test is administered multiple times to the same individuals. In this scenario, the statistics students are measuring their anxiety levels at the start and end of the quarter, resulting in pairs of data.
The paired data represents the measurements of anxiety levels for each student at two different points in time. By comparing the anxiety levels at the start and end of the quarter, the students can determine the consistency or reliability of their technique in lowering anxiety levels.
Therefore, the correct answer to the question is A) Test-retest.