Module 6: Probability & Sampling Error Flashcards
1
Q
What is Probability?
A
How likely is that one particular event (or result) happens given all possible outcomes
2
Q
How do we calculate Probability?
A
3
Q
What values can p take?
A
Between 1 and 0
p = 0: It certaintly will not happen
p = 1: Certaintly it will happen
4
Q
When is p = 0?
A
5
Q
When is p = 1?
A
6
Q
Why do we care about probability in statistics?
A
Theres always one chance you get a wrong result
If you dont know everything from a population that introduces uncertainty
7
Q
How does certainty play a role in sample vs population studies?
A
*rarely the case
8
Q
A
9
Q
What is sampling error?
A
- Is the difference between sample statistics every time we draw a sample from the population.
- Is the difference between the sample statistics and the population parameters (if known) when the sample is drawn from one population.
- In any case, those differences are attributable to
random factors
10
Q
Why is Sampling Error Important?
A
- It accounts for random differences
- It helps us understand the probability of observing a difference attributable to random factors
