1) There is no relationship between pain and burden a) Research hypothesis b) complex hypothesis c) null hypothesis d) directional hypothesis 2) senior students differ from junior students in academic performance a) complex hypotheis b) null hypothesis c) directional hypothesis d) non directional hypothesis 3) The outcome variable which we are trying to find out is a) Independent variable b) Dependent variable c) Confounding variable d) Demographic variable 4) effect on cryotherapy on pain, erythema and edema among patients undergoing invasive therapy. The independent variable is a) pain b) erythema c) edema d) cryotherapy 5) The variable which is not included in the study but can influence the outcome is a) independent b) dependent c) contributory d) confounding

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