WCOB 1033 Study Guide - Final Guide: Type I And Type Ii Errors, Statistical Significance, Cluster Sampling

• School: University of Arkansas
• Department: Walton College of Business
• Course: WCOB 1033
• Professor: J.Trivitt

Document Summary

Chapter 6: finding the probability of a value/event with population only. Final exam cheat sheet wcob 1033: z=(x- )/ . Chapter 7: finding the probability of a value with a population and a sample. Part a: sample mean is more/less than population mean. Part b: probability that the sample proportion will occur, given the population proportion: z=(x- )/( / n, z=(p-p)/ (p(1-p)/n) Chapter 8: confidence interval around the sample mean. Part a: population mean is unknown, standard deviation is known: margin of error= z( /2) x ( / n, confidence interval= x (z( /2) x ( / n) Part b: population mean is unknown, standard deviation is unknown: margin of error= t( /2,df) x (s/ n, confidence interval= x t( /2,df) x (s/ n) Part c: confidence interval around a proportion: margin of error: z( /2) x (p(1-p)/n, confidence interval= p z( /2) x (p(1-p)/n)