Final Flashcards
What tests can you use to compare sample mean to population mean?
- One sample z-test (population standard deviation is required)
- One sample t-test
What test do you use to compare two samples from two different groups?
Two independent samples t-test
What test do you use to compare two related sample averages, or two averages taken from the same sample?
Two related samples t-test
What test do you use to compare 3 or more sample averages?
ANOVA
What test do you use to test the independence two nominal variables by means of comparing observed and expected frequencies?
Chi-squared test
- expected frequencies would be if the variables were completely independent
What do measures of association do?
Explain if:
- there is a relationship between variables
- the strength of the relationship
- the direction of the relationship
What are the measures of association for nominal variables? (4)
1) Phi
2) Cramer’s V
3) Contingency coefficient
4) Lambda
What are the measures of association for ordinal variables? (5)
1) Gamma
2) Tau-b
3) Tau-c
4) Somers’ d
5) Spearman’s Rho
What is the measure of association for interval/ratio variables?
Pearson’s r
What measure of association do you use for 2x2 table of nominal data?
Phi
What measure of association do you use for square tables of nominal data?
Contingency coefficient
What measure of association do you use for rectangular tables of nominal data?
Cramer’s V
What measure of association do you use to compare errors we make by knowing the independent variable to errors we make without knowing the independent variable?
Lambda
What measure of association do you use to compare collapse ordinal variables? (pretty much a good go to I guess)
Gamma
What measure of association do you use to compare collapsed ordinal variables on a square table while considering tied pairs?
Tau-b
What measure of association do you use to compare collapsed ordinal variables on rectangular tables?
Tau-c
What measure of association do you use to compare collapsed ordinal variables directionally one rectangular or square tables?
Somers’ d
What measure of association do you use to compare continuous ordinal variables?
Spearman’s Rho
What do you use regression more?
To predict one variable from one or more variables
How do you calculate the percentage of the explained variation in the dependent variable by the independent variable?
Coefficient of determination r^2
