Lesson 13 (correlational research)

Question 1

Whats a correlation

Answer 1

A descriptive statistical technique that measures the relationship/association between two or more co-variables, to see if a trend or pattern exists

Question 2

What are co variables

Answer 2

The two measured variables in a correlational analysis. Variables must be continuous (ordinal or interval data)

Question 3

Positive correlation

Answer 3

Theres a relationship between 2 co variables
They move in the same direction.
Both values increase

Question 4

Negative correlation

Answer 4

Theres a relationship between 2 co variables
Co variables move in the opposite dorection
Both values decrease

Question 5

No correlation

Answer 5

No relationship between co variables

Question 6

Curvilinear correlation

Answer 6

A non linear relationship between co variables

Question 7

Correlation co effieicnet

Answer 7

A number between -1 and +1 that tells us how closely related the co variables ina correlatiional analysis are

+1 = perfect positive correlation
-1 = a perfect negative correlation
0 = no relationship

Question 8

Scale of co efficients

Answer 8

0 < r < 0.19 - very low correlation
0.2 < r < 0.39 - low correlation
0.4 < r < 0.59 - moderate correlation
0.6 < r < 0.79 - high correlation
0.8 < r < 1.0 - very high correlation

Question 9

Null hypothesis

Answer 9

There will be no significant relatiphship between the two co variables

Question 10

non - directional hypothesis

Answer 10

There will be a significant relationship netween the two co variables

Question 11

Directional hypothesis

Answer 11

There will be a significant positive/negative relationship between the two co variables