Research basic concepts- hypothesis, variables and sampling

Research terminology- hypothesis, variables and sampling, social work research/part 2 / Kerala PSC CDPO Exam Hypothesis -definition, characteristics,Types null and alternative .type 1 error and type 2 error variables -definition, types- continuous variables,non- continuous variables, dependent variable , Independent variable and extraneous variable sample - definition,sampling, probability and non- probability sampling methods Acknowledgments- Mr.Lims Thomas (Assistant professor, social work department,Vimala college Thrissur)