Statistics Ch. 1 - Data collection Questions & Answers

Statistics Ch. 1 - Data collection Questions & Answers anecdotal - ANSWER: the information being conveyed is based on casual observation, not scientific research approach - ANSWER: a way to look at and organize a problem so that it can be solved. bias - ANSWER: the results of the sample are not representative of the population blinding - ANSWER: nondisclosure of the treatment an experimental unit is receiving case-control studies - ANSWER: Retrospective studies that require individuals to look back in time or require the researcher to examine existing records. Individuals that have a certain characteristic are matched with those that do not. census - ANSWER: a list of all individuals in a population along with certain characteristics of each individual closed question - ANSWER: a question for which the respondent must choose from a list of predetermined responses cluster sample - ANSWER: Obtained by selecting all individuals within a randomly selected collection or group of individuals cohort studies - ANSWER: Identifies a group of individuals to participate in the study (the cohort). The cohort is observed over a period of time. Characteristics about the individuals are recorded. Some individuals are exposed to certain factors, and others are not. At the end of the study, the value of the response value is recorded for the individuals. completely randomized design - ANSWER: a design where each experimental unit is randomly assigned to a treatment confounding - ANSWER: Occurs when the effects of two or more explanatory variables are not separated, so any change in the response variable may be due to a variable that was not accounted for in the study. Continuous data - ANSWER