Which of the following is a TRUE statement?
A) Control variables used in cross-sectional regression analysis typically remove all bias.
B) Attrition of volunteers in randomized trials rarely occurs.
C) Randomized trials are typically expensive.
D) Randomized trials do not yield reliable results.

Question

Quizplus · Accepted Answer

Randomized trials often involve significant costs associated with recruiting and compensating participants, as well as managing data and conducting follow-up assessments. Choices A, B, and D are incorrect; while control variables can help to reduce bias in cross-sectional regression analysis, they do not necessarily eliminate all potential sources of bias, and randomized trials are generally considered the gold standard for establishing causal relationships in research. Attrition of volunteers in randomized trials can occur and may introduce bias if it is not addressed appropriately, but it is not rare. Finally, randomized trials can yield reliable results if they are designed, implemented, and analyzed appropriately.

Which of the Following Is a TRUE Statement