Assignment 8 Flashcards
Observed Frequency
Frequencies that are determined from observation (i.e., ones data).
Expected Frequency
Frequencies that are calculated from an expected pattern.
Cell
The intersection of two levels in a contingency table.
Column Percent
The proportion or percentage that is formed within a vertical column from the frequencies in a chi-square test for association.
Row Percent
The proportion or percentage that is formed within a horizontal row from the frequencies in a chi-square test for association.
Odds Ratio
A quotient of two odds that is conditioned by a dichotomous variable.
Chi^2 Goodness of Fit test
A form of hypothesis testing with frequencies in which the observed data are compared or “fitted” against expected values.
Chi^2 Test for Association
A chi-square goodness of fit test that is used to study the relationship between two categorical variables.
McNemar Test for Symmetry
A specific type of chi-square test that analyzes the change in a dichotomous variable.
Contingency Table
A table constructed with at least two factors that reveal the intersection of all levels. A contingency table is used in factorial ANOVA and with the chi-square test for association.
Phi Coefficient
A measure of association bounded between + and - 1 that is calculated from a 2x2 contingency table. The Phi coefficient is a specific instance of the Cramer V.
Cramer V
A measure of association bounded between + and - 1 that is calculated from a contingency table that is larger than 2x2.
Relative Benefit
Benefit: The quotient of the probability that a treatment helps divided by the probability that it does not help.
