EPI exam 3 - Week 3

Question 1

If a correlation is under 0.05 it signifies what?

Answer 1

There is a difference between groups

Question 2

If Dr. Segars says changes over time in the stem it is a buzzword for what type of test?

Answer 2

survival test

Question 3

What is a survival test?

Answer 3

Compares the proportion of events over time, or time-to events, between groups.

Question 4

Survival tests are commonly represented by what?

Answer 4

Kaplan-Meier curve.

Question 5

What is the nominal survival test?

Answer 5

Long-Rank test

Question 6

What is the Ordinal survival test?

Answer 6

Cox-Proportional Hazards test

Question 7

What is the Interval Survival test?

Answer 7

Kaplan-Meier test

Question 8

The interval survival test represents what instead of proportion or percentage?

Answer 8

Time

Question 9

What is a Regressions test?

Answer 9

Provides a measure of the relationship between variables by allowing the prediction about the dependent variable knowing the value of independent variables.

Question 10

Regression tests are able to calculate what?

Answer 10

OR for a measure of association

Question 11

Outcome prediction/Association (OR) =?

Answer 11

Regression

Question 12

What is the nominal regression test?

Answer 12

Logistic Regression

Question 13

What is the ordinal regression test?

Answer 13

Multinominal Logistic Regression

Question 14

What is the Interval Regression Test?

Answer 14

Linear Regression

Question 15

Predict is a buzzword for which type of test?

Answer 15

Regression

Question 16

If the Regression value is less than 0.05 you what?

Answer 16

Reject the Null; there is a difference

Question 17

If the Regression value is more than 0.05 you what?

Answer 17

Accept the null; there is no difference

Question 18

What is the third question you ask yourself when trying to select the appropriate statistical test?

Answer 18

How many groups are being compared? 2 or 3 or more?`

Question 19

What is the fourth question you ask yourself when trying to select the appropriate statistical test?

Answer 19

Is the data independent or related (paired)?

Question 20

In nominal data if you have two groups of independent data you run which test?

Answer 20

(pearson) Chi-Square test X^2

Question 21

In nominal data if you have three or more groups of independent data you run which type of test?

Answer 21

Chi-square test of independence

Question 22

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?

Answer 22

Fisher’s exact test

Question 23

If you have statistically significant findings (P<0.05) in three or more comparisons you must perform which type of tests?

Answer 23

Post-hoc testing

Question 24

What is the post-hoc testing for nominal ata?

Answer 24

Bonferroni test of Inequality (Bonferroni correction)

Question 25

In nominal data if you have 2 groups of paired/related data you use which type of test?

Answer 25

McNemar test

Question 26

In nominal data if you have 3 or more groups of paired/related data you run which type of test?

Answer 26

Cochran or Bonferroni test of inequality (Bonferroni correction)

Question 27

What are some key words for paried or related data?

Answer 27

“Pre- vs. Post-“ “Before vs. After”, “Baseline vs. End”