Unit 1 Flashcards
(22 cards)
What statistics
Is the study of how to collect, organize, analyze and interpret numerical information from data
What is the input , process, utput and benefit
Data, statistical analysis, information and decision making
What is data
Are the facts and figures,
Collected, analyze and summarized
For presentation and interpretation
What are elements
The entities on which the data are collected
What is a variable
Characteristics of interest for the elements
What is a population
The entire group of people or object of interest
What is a sample
A smaller group selected from that population
What is the difference between qualitative and quantitative data
Qualitative- deals with descriptions
Quantitative- deals with numbers
What is an internal source
Source from within entity or organization
What is an external source
Sources existent outside organization or entity
What is primary data
Data recorded at sources for the first time for specific purpose
What is secondary data
Data that already exists in a processed format
What are non probability sampling methods
Convince sampling
Judgement sampling
Quota sampling
Snowball sampling
What is convince sampling
When a sample is drawn to suit the convince of the researcher
What is judgement sampling
When researcher uses their judgement alone to select the best sampling unit
What is a disadvantage of non probability sampling methods
Likely to be bias
What are the methods probability sampling
Simple random sampling
Systematic random sampling
Stratified Radom sampling
Cluster random sampling
What are advantages of probability sampling methods
Reduces likeness of bias ness
Sampling error can be calculated
