EPI exam 3 - Week 3 Flashcards
If a correlation is under 0.05 it signifies what?
There is a difference between groups
If Dr. Segars says changes over time in the stem it is a buzzword for what type of test?
survival test
What is a survival test?
Compares the proportion of events over time, or time-to events, between groups.
Survival tests are commonly represented by what?
Kaplan-Meier curve.
What is the nominal survival test?
Long-Rank test
What is the Ordinal survival test?
Cox-Proportional Hazards test
What is the Interval Survival test?
Kaplan-Meier test
The interval survival test represents what instead of proportion or percentage?
Time
What is a Regressions test?
Provides a measure of the relationship between variables by allowing the prediction about the dependent variable knowing the value of independent variables.
Regression tests are able to calculate what?
OR for a measure of association
Outcome prediction/Association (OR) =?
Regression
What is the nominal regression test?
Logistic Regression
What is the ordinal regression test?
Multinominal Logistic Regression
What is the Interval Regression Test?
Linear Regression
Predict is a buzzword for which type of test?
Regression
If the Regression value is less than 0.05 you what?
Reject the Null; there is a difference
If the Regression value is more than 0.05 you what?
Accept the null; there is no difference
What is the third question you ask yourself when trying to select the appropriate statistical test?
How many groups are being compared? 2 or 3 or more?`
What is the fourth question you ask yourself when trying to select the appropriate statistical test?
Is the data independent or related (paired)?
In nominal data if you have two groups of independent data you run which test?
(pearson) Chi-Square test X^2
In nominal data if you have three or more groups of independent data you run which type of test?
Chi-square test of independence
In nominal data if you have two or more groups with an expected cell count of less than five, you run which type of test?
Fisher’s exact test
If you have statistically significant findings (P<0.05) in three or more comparisons you must perform which type of tests?
Post-hoc testing
What is the post-hoc testing for nominal ata?
Bonferroni test of Inequality (Bonferroni correction)
In nominal data if you have 2 groups of paired/related data you use which type of test?
McNemar test
In nominal data if you have 3 or more groups of paired/related data you run which type of test?
Cochran or Bonferroni test of inequality (Bonferroni correction)
What are some key words for paried or related data?
“Pre- vs. Post-“ “Before vs. After”, “Baseline vs. End”
