Comparing Two Populations
|Main Concepts | Demonstration | Activity | Teaching Tips | Data Collection & Analysis | Practice Questions | Milestone | Fathom Tutorial|
Data Collection and Analysis
This data set comes from an article in the Journal of Statistics Education ( "Datasets and Stories" article "Data Management, Exploratory Data Analysis, and Regression Analysis with 1969-2000 Major League Baseball Attendance" in the _Journal of Statistics Education_ (Cochran 2002, www.amstat.org/publications/jse/v10n2/datasets.cochran.html).)
However, you should access the data here: http://inspire.stat.ucla.edu/unit_12/mlbdata.txt
This file has several potential response variables. Your goal is to see how the American and National leagues compare on these variables. Some questions to consider:
a) What "research" question does a particular hypothesis test help answer?
b) Are the assumptions supported for a particular hypothesis test? Is a hypothesis test even needed? Does comparing means make sense?
c) Note that we have ALL data from 1969 to 2000. Is a statistical test meaningful in this context? To which population are we making inferences? What must we assume to make this test meaningful?