Summary First 5 Lect Flashcards
When multiplication in probablity
Independent and simultaneously
Sample space is
Mutually exclusive
Non mutually exclusive
Dependent
Independent
Set containing all possible outcomes
Either
Both can be together
Relate to each other
Does not affect each other
Intersection is
Intersection in mutually exclusive
Union is
Union in mutually exclusive
Union in non mutually exclusive
And
0
Or
A+b
A+b- both together
Conditional prob
Divide intersection over A
So A intersection B / A
A considered the whole population
Relative risk
No info about
Ratio of risk for exposure grp: no exposure grp
The absolute risk
B/A. /. B/A’
Test reliability
PV+
PV-
Get the denominator first
Disease+/test+
Disease-/test-
Test validity
Sensitivity
Specificity
Test+/disease+
Test-/disease-
Test validity 2
False +ve
False -ve
Test+/disease-
Test-/disease+
Binomial distribution
Fixed no. Of trials
Outcomes of trials are independent
Probability of success is constant
Binomial used to describe
No. Of siblings who will inherit a trait
No. Of patients who will have adverse reaction to the drug
Where to get data
Records
Surveys
Experiments
External like data banks
Simple random sample vs simple random sampling
Sampling is when a random subset of participants is selected
Sample are the ones selected each one having an equal chance to be selected
Experiment
Research study includes
Study where observations are made after condition manipulation
Designing sample protocol, data collection, conclusion
Systematic sampling interval k
N/n
Scientific methods yield…and..
Unbiased
Replicable
Best experimental design
Treatment grp+ control grp
Steps for experiment
Research question(from observation)
Testable hypothesis
Controlling variability
Selecting condition, samples and how to measure data
Analyze
Conclude and compare to previous studies
Graphs adv
Easy
Saves time
Relate and comparr
Determine extra info
Data interpretation
For nominal
For discrete
For continuous
For trend over time
Pie
Bar
Histogram
Line
Mean is..(disadv)
Median is…, rule
Interquartile range
Is interquartile range dispersion or central
Oversensitive to extremes
Positional avg, n+1/2
3(n+1)/4 - (n+1)/4. (POSITION)
Dispersion
Variance is
Rule
Std is
Dispersion around the mean
(Xi- x`)^2 / n-1
How close the data is around the mean
An event is
Result of an observation
Potential outcome
{}
Complementary event
The opposite of what I want
