There are several case studies that require knowledge of experimental design and sampling techniques. These case studies often focus on conducting research studies in various fields, such as medicine, social sciences, and environmental sciences. Some specific case studies that require knowledge of experimental design and sampling techniques are:


Clinical trials are an essential part of medical research, aiming to evaluate the safety and effectiveness of new drugs or treatments. These studies require a well-designed experimental design to ensure accurate and reliable results. Experimental design techniques like randomization and blinding are used to eliminate bias and ensure that the treatment groups are comparable. Sampling techniques such as stratified random sampling or cluster sampling may be employed to select a representative sample of participants.


Social surveys often require knowledge of experimental design and sampling techniques to gather data on social attitudes, behaviors, or opinions. A well-designed survey should use random sampling techniques to ensure that the sample is representative of the target population. Experimental design techniques can be applied in the form of randomized controlled trials within the survey to test the effectiveness of different interventions or policy measures.


Environmental impact studies aim to assess the potential effects of human activities on the environment. These studies often require experimental design and sampling techniques to collect and analyze data. Sampling techniques such as systematic sampling or stratified random sampling may be used to collect representative samples of soil, water, or air. Experimental design techniques can be applied to assess the effects of different variables or treatments on the environment.


Educational research often involves conducting experiments to evaluate the effectiveness of teaching methods or interventions. Experimental design techniques like random assignment of students to treatment and control groups are crucial to ensure unbiased results. Sampling techniques may be employed to select a representative sample of schools or classrooms.


In conclusion, several case studies require knowledge of experimental design and sampling techniques. These studies include clinical trials, social surveys, environmental impact studies, and educational research. By applying appropriate experimental design and sampling techniques, researchers can ensure the validity and reliability of their findings, contributing to the advancement of knowledge in various fields.