## Exam Information

Login / Sign Up to View Document

## Sample Document Text

STAT 515 - Section 13.3 Supplement
Brian Habing - University of South Carolina
Last Updated: December 2, 2003
S13.3 - Chi-Square Test for Homogeneity
Section 13.3 discusses the Chi-Square Test for Independence, where the n observations are a
random sample from a single population of interest (note that the grand total n is fixed in Table
13.4a and that this is the first assumption in the box on page 719). The easiest way to check that
you are performing a test of independence is that you know the grand total (n) in advance, and
not the row totals (the r
i
) or column totals (the c
j
).
From the work on page 716 we see that the expected value for cell ij is =)(
^
ij
nEr
i
c
j
/n. We
can also verify why the formula for the degrees of freedom is (r-1)(c-1). The basic formula for
calculating the degrees of freedom is: # cells - # parameters estimated - # free cells.
1. The number of cells in the table is the number of rows times the number of columns,
so rc...

## Related Documents

Make-to-Order Exam

Assumptions Exam

Credit Card Exam

Combinations Exam

Concentrated Exam

Assumptions Exam

Standard Deviation Exam

Independence Exam

Approximation Exam

Combinations Exam

Assumptions Exam

Either...or Exam

Significance Exam

Either...or Exam

Probabilities Exam

Calculators Exam

© Copyright 2019 , Koofers, Inc. All rights reserved.

The information provided on this site is protected by U.S. and International copyright law, and other applicable intellectual property laws, including laws covering data access and data compilations. This information is provided exclusively for the personal and academic use of students, instructors and other university personnel. Use of this information for any commercial purpose, or by any commercial entity, is expressly prohibited. This information may not, under any circumstances, be copied, modified, reused, or incorporated into any derivative works or compilations, without the prior written approval of Koofers, Inc.