Pur 3500 Exam 2 Questions And Answers Pdf

What are the notations for types of designs? {Ans: R = random assignment O = observation (assessing dependent variable) X = manipulation/treatment}What is variance? {Ans: the average of the squared deviations}What is a threat to quasi-experimental design? {Ans: sampling bias}What is social desirability bias? {Ans: over-reporting desirable behaviors, underreporting undesirable behaviors}What should response options have? {Ans: Match the question Be mutually exclusive, no overlap Be exhaustive, everyone can answer question Have equal number of positive and negatives, balanced response options}What is a threat to static group design? {Ans: sampling bias}What is margin of error? {Ans: statistical estimate of the amount your results will vary from the population}What is sampling? {Ans: Describes how you are selecting your subjects to study}What are the steps to creating mail surveys? {Ans: 1) Write cover letter 2) Create the package 3) Distribute the survey 4) Monitor rates 5) Follow-ups}What is intracoder reliabilty? {Ans: agreement for same coder over time}What does an ANOVA test assess? {Ans: the difference in the means of a quantitative variable for different values of a nominal variable (two different means)}What is a type I error? {Ans: Wrongly reject a