Summary First 5 Lect

Question 1

When multiplication in probablity

Answer 1

Independent and simultaneously

Question 2

Sample space is
Mutually exclusive
Non mutually exclusive
Dependent
Independent

Answer 2

Set containing all possible outcomes
Either
Both can be together
Relate to each other
Does not affect each other

Question 3

Intersection is
Intersection in mutually exclusive
Union is
Union in mutually exclusive
Union in non mutually exclusive

Answer 3

And
0
Or
A+b
A+b- both together

Question 4

Conditional prob

Answer 4

Divide intersection over A
So A intersection B / A
A considered the whole population

Question 5

Relative risk
No info about

Answer 5

Ratio of risk for exposure grp: no exposure grp

The absolute risk

B/A. /. B/A’

Question 6

Test reliability
PV+
PV-
Get the denominator first

Answer 6

Disease+/test+
Disease-/test-

Question 7

Test validity
Sensitivity
Specificity

Answer 7

Test+/disease+
Test-/disease-

Question 8

Test validity 2
False +ve
False -ve

Answer 8

Test+/disease-
Test-/disease+

Question 9

Binomial distribution

Answer 9

Fixed no. Of trials
Outcomes of trials are independent
Probability of success is constant

Question 10

Binomial used to describe

Answer 10

No. Of siblings who will inherit a trait
No. Of patients who will have adverse reaction to the drug

Question 11

Where to get data

Answer 11

Records
Surveys
Experiments
External like data banks

Question 12

Simple random sample vs simple random sampling

Answer 12

Sampling is when a random subset of participants is selected
Sample are the ones selected each one having an equal chance to be selected

Question 13

Experiment
Research study includes

Answer 13

Study where observations are made after condition manipulation
Designing sample protocol, data collection, conclusion

Question 14

Systematic sampling interval k

Answer 14

N/n

Question 15

Scientific methods yield…and..

Answer 15

Unbiased
Replicable

Question 16

Best experimental design

Answer 16

Treatment grp+ control grp

Question 17

Steps for experiment

Answer 17

Research question(from observation)
Testable hypothesis
Controlling variability
Selecting condition, samples and how to measure data
Analyze
Conclude and compare to previous studies

Question 18

Graphs adv

Answer 18

Easy
Saves time
Relate and comparr
Determine extra info
Data interpretation

Question 19

For nominal
For discrete
For continuous
For trend over time

Answer 19

Pie
Bar
Histogram
Line

Question 20

Mean is..(disadv)
Median is…, rule

Interquartile range
Is interquartile range dispersion or central

Answer 20

Oversensitive to extremes
Positional avg, n+1/2

3(n+1)/4 - (n+1)/4. (POSITION)
Dispersion

Question 21

Variance is
Rule
Std is

Answer 21

Dispersion around the mean
(Xi- x`)^2 / n-1
How close the data is around the mean

Question 22

An event is

Answer 22

Result of an observation
Potential outcome
{}

Question 23

Complementary event

Answer 23

The opposite of what I want