MacroPhage

Epidemiological research is a type of medical research that is specialized in determining the distribution of diseases in population, risk factors and health determinants relating to diseases. There are 2 types of Epidemiological research: Observational studies: In these studies, no intervention from investigator as we observe effect of something like risk factor or treatment without attempting to change who is exposed to it or not. These studies are classified into: Individual based: a)       Descriptive studies : are to describe the occurrence of the disease in population (pattern of disease) such as case reports or series. b)      Analytical studies : are to analyze the relationship between exposure and outcome such as Cross sectional, Case control, Cohort study. Population Based: a)       Descriptive : includes health survey. b)      Analytical : includes ecological study. Experimental studies: They are interventions to change many variab

1)     Mrs. Trahan samples her class by selecting 5 girls and 7 boys.  This type of sampling is called? a)     Stratified b)     Systematic c)      Simple d)     Cluster 2)     Mrs. Trahan samples her class by selecting every third person on her class list.  Which type of sampling method is this? a)     Simple b)     Systematic c)      Stratified d)     Cluster 3)     Mrs. Trahan samples her class by selecting all students sitting at group 1 and group 5 in her classroom.  This sampling technique is called? a)     Simple b)     Stratified c)      Systematic d)     Cluster 4)     Mrs. Trahan samples her class by picking 10 numbers from her hat and each number is assigned to a student. This is ______________ random sampling. a)     Systematic b)     Simple c)      Stratified d)     Cluster 5)     Farmer Joe separates his apple tree farm into 10 regions.  He counts the number of apples produced in just one of the regions and uses that estimate