Dental Difference between descriptive or analytical study and experimental study is A Descriptive study has a small sample B Experimental study requires a strong knowledge of statistics by the operator C Analytical study requires the use of sophisticated instruments D All variables are under the control and can be modified by the operator 💡 Explanation Difference between descriptive or analytical study and experimental study is ✓ Correct Answer: D. All variables are under the control and can be modified by the operator