stat3215cbe 1

Competency

Formulate and evaluate hypothesis tests for population parameters based on sample statistics using both Critical Regions and P-Values, and be able to state results in a non-technical way that can be understood by consumers of the data instead of statisticians.

Dealing with Two Populations

Inferential statistics involves forming conclusions about a population parameter. We do so by constructing confidence intervals and testing claims about a population mean and other statistics. Typically, these methods deal with a sample from one population. We can extend the methods to situations involving two populations (and there are many such applications). This deliverable looks at two scenarios.

Concept being Studied

Your focus is on hypothesis tests and confidence intervals for two populations using two samples, some of which are independent and some of which are dependent. These concepts are an extension of hypothesis testing and confidence intervals which use statistics from one sample to make conclusions about population parameters.

What to Submit

Your research, calculations, and analysis should be presented on the spreadsheet

provided.

Grading Rubric

F	F	C	B	A
0	1	2	3	4
Not Submitted	No Pass	Competence	Proficiency	Mastery
Not Submitted	Did not correctly solve a majority of the problems or at least one problem left blank.	Correctly solved a majority of the problems.	Correctly solved almost all the problems.	All problems are solved correctly.
Not Submitted	Very few steps are provided to explain how to solve the problem OR the steps provided have several errors.	Fairly complete and detailed steps are provided to explain how to solve the problem OR the steps provided have some errors.	Mostly complete and detailed steps are provided to explain how to solve the problem.	Complete and detailed steps are provided to explain how to solve the problem.
Not Submitted	Explanations generally lack a basic understanding of the statistical concepts or lack of proper terminology.	Explanations demonstrate a basic understanding of most of the statistical concepts and terminology, but some explanations may be incomplete or incorrect.	Explanations demonstrate a proficient understanding of most of the statistical concepts and terminology, but with small errors.	Explanations demonstrate a mastery of understanding of the statistical concepts and terminology.
Not Submitted	The majority of variables, equations, and expressions are not properly formatted.	The majority of variables, equations, and expressions are properly formatted.	Almost all variables, equations, and expressions are properly formatted.	All variables, equations, and expressions are properly formatted.