4. simple regression Flashcards
like correlation
anouther inferntional test about relation between variables
difference to correlation
regression analysis on one var can predict score on anouther
predictor varibale
similar to iv ( to help understand only) -THERE IS NO ACC IV
outcome varible
simialr to DV
assume
chnages on var (x) changes anouther (y)
therefore as assume constant relation= (linearty) we now that we can predict one var= if one goes up predict other one ect.
(RELATES TO LINEAR)
the assumption of constanct relation is summerised by
line of best fit
linear relation
positive= high x assosiated high y
negative high x assosiated with low y
perfect linear
-1-perfect neg linear rel
1-per pos linear rel
whats regression purpose
extention when 2 variables correlated
regression produces predict scores
predicted scores (variables)
outcome var= aim to predict (y)
predictor var- use to predict y (x)
( here use linear relation eg pos or neg)
outcome and predict var in axit
outcome=y axis
predictor= x axis