Correlation

Pearson correlation

measures degree and direction of linear relationship between variables.

Outliers

________ can have significant effects on correlation (can make i stronger)

Reliability

relationship between dif applications of same test.

IQ

________ can predict 36 % of a college GPA.

Coefficient of determination

r^2 is the proportion of variability in one variable that is explained by the other.

positive direction

as x increases, y increases

negative direction

as x increases, y decreases

linear form

the points tend to form a straight line

strength / consistency

how close a correlation resembles a line

correlation of 0

no correlation

reliability

relationship between dif applications of same test

validity

how well the test measures what it's supposed to

always check data

pearson correlation won't detect non-linear correlation

0.01

small correlation

0.09

medium correlation

0.25+

large correlation