# Lecture 15 - Correlation and Multiple Regression Practice Flashcards

Can you analyse the same dataset using simultaneous, stepwise and hierarchical regression?

Yes!

How are variables added in hierarchical regression?

Increasing, eg 2 variables then 7 then 9

How are variables added in stepwise regression

Decreasing, eg 6 then 5 then 4

Keeps the one with highest effect and removes it, keeps doing so until removing a variable has very little/no effect

How do we calculate the f-ratio?

MEAN SQUARES!!!

bgMS

What is R in multiple regression?

The multiple correlation coefficient. It is one measure among a few that tells us about how well the IVs predict the DV

What is R squared in multiple regression?

The coefficient of determination

Tells us what proportion of the variance of the DV can be explained by the IVs

There’s also an adjusted r squared which we use in order to report our data more accurately

What is the purpose of unstandardised coefficients in linear regression

They indicate how much of the DV varies with one IV when all other IV’s are held constant

In regression what do the individual significance of the individual IVs tell us

This tells us wether each IV contributes significantly to predicting the DV