BRM Exam 1 Questions and Answers 100% Correct(RATED A+)

individuals - ANSWER-the people or objects included in the study Variable - ANSWER-A factor that can change in an experiment that takes a numerical value observational studies - ANSWER-Researchers carefully and systematically observe and record behavior without interfering with behavior. Sample surveys (type of observational study) - ANSWER-A study that obtains data from a subset of a population, in order to estimate population attributes. Population - ANSWER-the entire group of individuals about which we want information Sample - ANSWER-part of the population from which we actually collect information and is used to draw conclusions about the whole. Census - ANSWER-attempts to measure every individual in a population. Experiments - ANSWER-deliberately imposes some treatment on individuals in order to observe their responses. Study whether or not the treatment causes a change in response not representative - ANSWER-Bias from samples occurs when the sample drawn is not representative of the population of interest. Parameter - ANSWER-a number that describes a population A parameter is a fixed number statistic - ANSWER-a number that describes a sample The value of a statistic is known when we have taken a sample, but it can change from sample to sample.