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Terms in this set (20)

Statistics -This is the science of collecting, organizing, summarizing, and analyzing information to draw conclusions or answer questions. It is also about providing a measure of confidence in any conclusions.
Population -The entire group of individuals to be studied
The response variable- The variable of interest in the outcome of a study
A quantitative variable- This provides numerical measures of individuals. The values of these can be added or subtracted, and provide meaningful results.
A qualitative variable-Allow classification of individuals based on some attribute or characteristic
A variable- The characteristics of the individuals within the population
designed​ experiment - A researcher randomly assigns the individuals in a study to groups, intentionally manipulates the value of the explanatory variable and controls other explanatory variables at fixed values, and then records the value of the response variable for each individual.
observational​ study-A researcher measures the value of the response variable without attempting to influence the value of either the response or explanatory variables. That is, the researcher observes the behavior of individuals in the study and records the values of the explanatory and response variables.
lurking variable- This is an explanatory variable that was not considered in a study, but that affects the value of the response variable in the study. In addition, these are typically related to explanatory variables considered in the study.
Confounding-This occurs when the effects of two or more explanatory variables are not separated. Therefore, any relation that may exist between an explanatory variable and the response variable may be due to some other variable not accounted for in the study.