Final: Random Flashcards
What is a type I error?
Rejecting the null hypothesis when it was actually true (false +)
What is the null hypothesis?
There is no difference between the two groups being compared
What is a type II error?
Not rejecting the null hypothesis when it is actually false (false -)
What is the definition of a p-value?
Probability of making a type I error if null hypothesis is rejected
What is the relationship of mean and median if the data is skewed left?
Mean < Median
Left side tail
What do we start out knowing in a cohort study?
Exosure
What do we start knowing in a case-control study?
Disease (always retrospective)
What type of studies are analytical, observational?
Case-control
Cohort
What kinds of studies are strictly analytical?
Interventional
What kinds of studies are strictly observational?
Cross-section
Ecological
What is the relationship between the mean and median if the data is skewed right?
Mean > Median
Right side tail
What is Josh’s favorite recreational drug?
Heroine
