Statistics is a set of for analyzing info to help make a decision.
Science of data: used for collecting, organizing, displaying, describing, and data.
Data: pieces of collected.
Population: entire group
Sample: of the population
Various ways of data collection:
- surveys - observational studies (is there a ?) - experiments (is there and effect?)
Surveys
Census: entire is asked to respond to questions Sample Survey: is selected and asked
Observational Study vs. Experiment
Observational Study: "What is" - look don't touch, no Problems with this? - can't determine & effect - if you want a cause & effect you would have to actively manipulate a variable ()
Experiment: determines cause & effect
Inferential Statistics: analyses for data from a sample to infer something about a Probability: likelihood that a certain outcome will
Using statistics in the Research process: 1. Identify 2. Collect 3. Organize, display, and data 4. data
It is important to avoid biased data.
Convenience sampling: selecting individuals who are to reach Voluntary sampling: Individuals to be in the sample
You should always do convenience sampling or voluntary response sampling. You avoid bias by either selecting yourself or having people volunteer.
