Question: In Example a study by Slutske, Piasecki, and Hunt-Carter (2003; and on the website for this book) was presented, in which the mean number of hangover symptoms was compared for students whose parents have alcohol problems and students whose parents do not. Researchers are interested in knowing if the mean number of hangover symptoms is higher for the population of students whose parents have alcohol problems than for the population whose parents do not. The sample statistics are as follows:
a. Carry out the five steps of hypothesis testing using the unpooled procedure.
b. Repeat part (a) using the pooled procedure.
c. Compare the unpooled and pooled results and discuss which procedure is more appropriate.
Example: Parental Alcohol Problems and Child Hangover Symptoms Slutske, Piasecki, and Hunt-Carter (2003) conducted a study on hangover symptoms in college students, using a sample of 1227 students who were enrolled in introductory psychology classes and who acknowledged that they currently use alcohol.