L4- Correlations

Question 1

What is correlations

Answer 1

A technique used for analysing the strength of the relationship between two quantitative variables known as co variables

Question 2

Types of correlations

Answer 2

• positive - one increases, so does other
• negative- one increases, other decreases
• No correlation- no relationship

Question 3

What is the correlation coefficient

Answer 3

The strength of the correlation

Question 4

Advantages of correlations

Answer 4

• allows to establish strength between two variables
• allows researches to investigate things that could not be manipulated experimentally for ethical or practical reasons
• correlations can help conduct predictions on one variable based on what is known about the other

Question 5

Disadvantages of correlations

Answer 5

• cannot demonstrates cause and effect
• don’t know if variables are related or if there is a third unknown variable
• correlations only measure linear relationships not curvilinear

Question 6

curvilinear relationship

Answer 6

• relationship between two variables where as one variable increases, so does the other variable, but only up to a certain point, after which, as one variable continues to increase, the other decreases.
• reverse U