Quiz 1 Flashcards
(25 cards)
Binary
2 options
Non-binary
More than two options
Nominal
No specific rank or order
Ordinal
Specific rank or order
Discrete
Involves numbers without decimals
Continuous
With decimals
Categorical data
What eye colour only so many colours
Types of sampling experiments
Observational
Experimental
Experimental data
You must give specific rules to your experiment and have a control
Observational
Just taking data by two groups of people without any control
What do we need for a good sampling experiencing
Control
Randomization
Replication
Primary data
Data found by experiments you yourself has done
Secondary data
Using data found by another person
Simple random sampling
Where a person is chosen by chance like picking names out of a hat
Systematic sampling
If you picked evrey 5th person for example
Stratified
Groups split into categories like grade 10 grade 9 etc and a correct number is students from each will be taken to do the survey
Cluster
Big groups and random amount of groups get chosen everyone in the groups chosen will be surveyed
Multi stage
Goes by diffeent stages to get the best candidates for sampling
Voluntary sampling
Bad example as people have a option to do the survey
Voluntary sampling
Bad example as people have a option to do the survey
Convenience sampling
Bad example as you need more diversity in people to be sampled rather than what people are convenient to survey
Cenus
Data collected from every member of a population
Bargraphs
Used for qualitative data, using different categories
Histogram
Used for continuous data, bars represent intervals
