Sampling
When a population is divided into convenient groups, an entire group is chosen randomly as the same.
Cluster Sampling
How much bias is systematic?
Moderate bias
What's a statistical question?
A question that can be answered by collecting many pieces of information or data
+NOT a one-answer question
Explain a sample survey. (Type of study)
When you ask every member of a sample the same set of questions and record their answers.
What's the center also known as?
The median
Only choosing subjects that are in close proximity or easy to get to.
Convenience Sampling
How much bias is Simple Random sampling?
no bias
What's a categorical variable?
- Not numbers
- Data fits into categories
Explain an experimental study.
Involves APPLYING a treatment to some group or groups, measuring the effects of the treatment.
What's the spread also known as?
IQR
Each member of a population is equally likely to be chosen
Simple Random Sampling
How much bias is convenience/self-selected sampling?
High bias
What's a quantitative variable?
- Numerical data
Explain an observational study.
Observe members of a sample and record results WITHOUT applying any treatment.
Imma get a...
100%
When you start with one member chosen random then use a rule to select the rest of the members.
Systematic Sampling
How much bias is stratified sampling?
Moderate bias
What's a population/parameter?
A set of all members of a group that you want to know something about.
What's the equation for IQR
Q3-Q1
Today I need to work on...
Drinking more water and controling how much I eat
When a population is divided into groups with simular characteristics and a sample is randomly chosen from each group
Stratified Sampling
How much bias is cluster sampling?
Moderate
What's a Sample/statistic?
What's the equation for Range?
Max-Min
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