Data Flashcards
Correlation
A mathematical technique used to investigate the relationship between two variables, called co - variables
Types of correlation
• a positive correlation
• a negative correlation
• a zero correlation
A positive correlation
When one co - variables increases as another increases or vice versa
A negative correlation
When on co - variable increases, the other decreases or vice versa
A zero correlation
When there is no relationship between the two co - variables
Strength of correlation
A good starting point for research
Weakness of correlation
Even though it shows how the variables are related, it doesn’t show how the variables are related
Types of data
• primary data
• qualitative data
• quantitative data
• secondary data
Primary data
Information that has been obtained first hand by the researcher for the purpose of a research project
Strength of primary data
It suits the aim of the research
Weakness of primary data
It takes more time and effort to collect
Qualitative data
Information that is expressed in words and not numbers
Strength of qualitative data
It has more depth and detail then quantitative data
Weakness of qualitative data
More difficult to analyse
Quantitive data
Information that can be counted usually in the form of numbers
Strength of quantitative data
It can be easily analysed
Weakness of quantitative data
Lacks the depth and detail of qualitative data
Secondary data
Information that has been gathered by someone other than the researcher before the current investigation
Strength of secondary data
It is easy to access
Weakness of secondary data
The study of studies may not quite fit what the researcher wants
Descriptive statistics
The use of graphs, tables and summary statistics
Range
A simple measure of the dispersion in a set of data
Strength of range
Very straight forward to calculate
Weakness of range
Can be distorted by an extreme score
