BIOL132 - L7

HideShow resource information
  • Created by: Katherine
  • Created on: 07-06-16 21:56
What does a correlation do>
It illustrates the direction and strength of a relationship between 2 variables e.g. height and shoe size.
1 of 11
WHat is used to illuastrate this correlation?
Scatterplot
2 of 11
What is a positive correlation?
High scores on one variable associated with high scores on another
3 of 11
What is a negative correlation>
A negative correlation is the opposite; high scores on one variable are linked with low scores on another.
4 of 11
What is correlation measure on?
A scale of +1 = perfect positive correlation, 0 = no correlation, -1 = perfect negative correlation.
5 of 11
What is pearson's correlation coefficient
r=1 - it is the most common measure of correlation.
6 of 11
What does pearson's correlatino coefficient assume?
It assumes continous data (if not then use spearman's test0, linear relationship between variables - measures linear correclation.
7 of 11
How do you determine is scores on one variable predict or explain those on another>
Square the correlation number and multiply by 100.
8 of 11
Give an example of this:
Correlation between number of session and satisfaction = 0.5, so 25% of variability can be predicted of satisfaction. 75% remains unexplained
9 of 11
What is regression?
It is the relaationship between variables.
10 of 11
What is regression used for?
To caluclate line of best fit.
11 of 11

Other cards in this set

Card 2

Front

WHat is used to illuastrate this correlation?

Back

Scatterplot

Card 3

Front

What is a positive correlation?

Back

Preview of the front of card 3

Card 4

Front

What is a negative correlation>

Back

Preview of the front of card 4

Card 5

Front

What is correlation measure on?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all BIOL132 resources »