Assignment 8 Flashcards
(13 cards)
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.
