Correlations

Question 1

Correlation

Answer 1

Determining the association between two variables

Zero correlation= co-variables not linked

Positive correlation= co-variables increase together

Negative correlation= as one co-variable increases, the other decreases

Question 2

Correlational hypothesis

Answer 2

States the expected association between the co-variables

eg: Age and beauty are positively correlated (pos correlation, directional hypothesis)

Question 3

Scattergrams

Answer 3

A correlation can be illustratrd using a scattergram

Scatter of the dots indicate the degree of correlation between co-variables

Use a correlation coeffieicent to decide whether there is a meaningful correlation

Question 4

Correlation coefficient

Answer 4

A number between +1 and -1 that tells us how closely the co-variables in a correlational analysis are linked

Use a statistical test to calc correlation coefficient

Question 5

Correlations eval

Answer 5

str: investigate trends. If a correlation is signif then further investiagtion is justified

Prcoedures easily repeated

Lim: Can’t determine cause and effect, only correlation but ppl assume causal relationships. Causal connection may be bc of intervening variables (unkown variables which can explain who the co-variables are linked