नीचे दो कथन दिए गए हैं: कथन I: नमूना आकार (sample size) निर्धारित करने में समय और लागत प्रासंगिक नहीं हैं। कथन II: नमूनाकरण त्रुटि (sampling error) तय करने में यूनिट गैर-प्रतिक्रिया और आइटम गैर-प्रतिक्रिया का कोई महत्व नहीं होता है। उपरोक्त कथनों के आलोक में, नीचे दिए गए विकल्पों में से सही उत्तर चुनिए:

Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R). Assertion (A): Though ex-post facto research examines cause and effect relationships, it is not part of experimental research. Reason (R): In ex-post facto research, the effect or change in the independent variable has already occurred and cannot be manipulated. In the light of the above statements, choose the most appropriate answer from the options given below:

Given below are two statements: one is labeled as Assertion (A) and the other is labeled as Reason (R). Assertion (A): In non-probability sampling, the units are selected at the discretion of the researcher. Reason (R): Non-probability samples do not require a sampling frame. In the light of the above statements, choose the most appropriate answer from the options given below: