अनुसंधान पद्धति (रिसर्च मेथोडोलॉजी) में निम्नलिखित में से कौन से औपचारिक प्रयोगात्मक डिजाइनों (Formal Experimental Designs) के स्वीकृत प्रकार हैं? A. यादृच्छिक ब्लॉक डिजाइन (Randomized block design) B. फैक्टोरियल डिजाइन (Factorial design) C. लैटिन स्क्वायर डिजाइन (Latin square design) D. प्रीटेस्ट-पोस्टटेस्ट कंट्रोल ग्रुप डिजाइन नीचे दिए गए विकल्पों में से सही उत्तर चुनें:

A researcher undertaking an investigation into the effects of the internet upon sports leagues is an example of:

Match the types of variables in LIST-I with their corresponding meanings in LIST-II: LIST-I (Type of Variable) A. Extraneous Variable B. Dependent Variable C. Control Variable D. Moderator Variable LIST-II (Meaning) I. A factor that could possibly influence the results and that is kept constant or out of the study. II. A kind of independent variable (e.g., age, sex) that cannot be manipulated but is studied. III. A factor that could affect the relationship between the independent and dependent variables but is not controlled. IV. The measured effect or outcome resulting from the independent variable. Choose the correct answer from the options given below: