Nonparametric tests
This is the non parametric test for a 2 sample t test
Mann Whitney U test
What statistical test would we use to test the difference between people watching american idol and their hair color? The sample is 200 people.
Chi Square test of association
What is the statistical test for 2 independent variables?
2 sample t test
What is the DF for chi square goodness of fit?
# of categories - 1
This is the nonparametric test for a paired t test
2 population sign test
You assign 50 people to a deep breathing regime and 50 people to a normal breathing regime and ask them how they feel after 10 minutes.
Chi square test of homogeneity
Do energy drinks significantly increase blood pressure after ingestion? What is the statistical test?
Paired t test?
What is randomization vs random sampling?
Random sampling: using element of chance to select EU from a pop
Randomization: using element of chance to assign EU to a treatment
This is the nonparametric test for a t test for correlation
Spearman’s rank test
You want to know if the distribution in corbicula in the potomac river follows a distribution called the hakenkamp distribution
chi square goodness of fit test
How do we know if something is a left tailed test?
before - after
When do you use block design?
Pre vs post test
This is the nonparametric test for t test for regression
Not applicable
A survey is observational
An experiment designs EUs
What is the DF for CRD?
(n1+n2)-2
What is the difference in normality assumption for regression vs correlation?
Regression is only on the y axis
Correlation is the x and y axis
free question
You’re going to do well
What is the criteria for qualitative data fitting normality?
observed > 5
Df for blocked data
df = # pairs - 1
n-2