Research Methods- Correlations Flashcards
Research methods-
The process by which information or data is collected usually for the purpose of testing a hypothesis and/or a theory.
Correlation -
A mathematical technique in which a researcher investigates an association between two variables, called co-variables.
Correlation coefficient - A number between
-1 and +1 that represents the direction and strength of a relationship between co-variables.
What does the term “correlation” refer to in mathematics?
Correlation refers to a mathematical technique that measures the relationship or association between two continuous variables (co-variables).
How are correlations typically represented visually?
Correlations are represented visually using a scattergram, where each axis represents one of the variables being investigated.
What is a correlation coefficient?
A correlation coefficient is a numerical value between -1 and +1 that indicates the strength and direction of the relationship between two variables.
What does a correlation coefficient of +1 represent?
A correlation coefficient of +1 represents a perfect positive correlation.
What does a correlation coefficient of -1 represent?
A correlation coefficient of -1 represents a perfect negative correlation.
What does a correlation coefficient close to 0 indicate?
A correlation coefficient close to 0 indicates a weak relationship between the variables.
Can a weak correlation coefficient still be statistically significant?
Yes, even weak correlation coefficients can be statistically significant, depending on the size of the data set.
What does the letter ‘r’ stand for in correlation analysis?
The letter ‘r’ stands for the correlation coefficient.
What does a correlation coefficient of +0.3 indicate?
A correlation coefficient of +0.3 indicates a weak positive correlation.
What does a correlation coefficient of -0.6 indicate?
A correlation coefficient of -0.6 indicates a moderate negative correlation.
What does a correlation coefficient of 0 indicate?
A correlation coefficient of 0 indicates no correlation between the variables.
How is the strength of a correlation determined?
The strength of a correlation is determined by how close the correlation coefficient is to +1 or -1; the closer it is, the stronger the relationship.
What is the range of possible values for a correlation coefficient?
The range of possible values for a correlation coefficient is from -1 to +1.
