PPGA 503

PPGA 503 FINAL EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED What is a null hypothesis? What is an alternative hypothesis? How do you report it? H0- There is no effect HA- There IS an effect "The evidence supports the HA, so we reject the null hypothesis" "We reject H0 up to the 95% interval" What is p-value (probability values)?*** 1. Refers to the probability that a condition or circumstance would happen just by chance without experimental intervention. 2....

PPGA 503 MIDTERM EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED Observation Captures a characteristic of interest. Data Collection of observations we're interested in. Population total set of subjects of interest Parameter summary measure of population data Sample Subset of the population we have observations for Statistic Summary of the sample data Descriptive statistics summarize and describe data Inferential statistics Make predictions about the population ba...

PPGA 503 MIDTERM EXAM QUESTIONS AND ANSWERS WITH COMPLETE SOLUTIONS VERIFIED Statistics the body of methods for obtaining and analyzing data; a summary of the sample data. They provide methods for: • Design: Planning how to gather data for a research study to investigate questions of interest to us. • Description: summarizing data obtained in the study • Inference: making predictions based on data, to help us deal with uncertainty in an objective manner Observational Studies cap...