measurements of central tendency
Measures of dispersions
Stages of study
Study design
Study design
100
Symbol (X Bar)
mean
100
Measure of the amount of variation of the values of a variable about its mean.
Standart deviation
100
Data collection and database preparation
II
100
Include intervention
Experimental
100
Framingham study- type?
Cohort
Observational
200
the value separating the higher half of a data sample from the lower half.
Median
200
the ratio of the standard deviation σ
C.V.- Coefficient of variation
200
Inferential statistics
IV
200
Find association between risk factor and outcome
Observational
200
Gold standart among observational
Prospective Cohort study
300
Sum of the Given Data/Total number of Data
Average/mean
300
Difference between highest and lowest numbers in data set
Range
300
Grouping data, summarizing data
III
300
Analytical among observational
Cross- sectional
Case-control
Cohort
300
Calculation of Relative risk/ Incidence rate
Cohort study
400
The number in a data set that occurs most frequently
Mode
400
Difference between Quartile I and Quartile III
IQR- interquartile range
400
Program and Plan
I
400
Survey study among observational
Cross-sectional
400
Calculation of Odds Ratio
Case-control study
500
Which on is more robust/ not affected by outliers
Median
500
25-th percentile and 75-th percentile
QI and QIII
500
Setting Hypotheses
I
500
Cross-over design
Experimental
500
Double blindness
neither patients nor doctors aware of type of treatment