Statistical Sciences 1024A/B Chapter Notes - Chapter 9: Store Brand, Statistical Significance, Teaching Method

• School: Western University
• Department: Statistical Sciences
• Course: Statistical Sciences 1024A/B
• Professor: Sohail Khan

Document Summary

Study designs can be classified in two ways (observational & experimental) Response variable (y) dependent variable: response variable is the measurement of each individual, not the whole great. If response variable is quantitative then the means are compared; if the response variable is categorical then the percentages are compared. Experimental units the thing being studied & treatments being applied to it: vitamin c tested for strength after 2, 5, 8, 10 months = 4 experimental units. Treatment specific experimental conditions applied to subjects; the levels of the factor. Factor explanatory variables (independent variables: levels of factor. Outcome response variable (dependent variable: not on group, but on each individual. Controlled study all other factors (placebos, differences in subjects) can be accounted for so that differences in improvement can be attributed to the treatments. Lurking variable other things that may affects relationship between independent & response variable.