correlations
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5 Terms
what do correlations tell us
tells us strength and direction of the association or relationship between co-variables
how are correlations plotted
on scatter diagram
what positive , negative and zero correlation
positive - as one co variable increases other also increases
negative - as one increases the other decreases
zero - no relationship between co variables
whats a strength
good primary tool = provides quantifiable measure of how 2 co variables are related = saves money and time
quick and economical = no need for controlled enviro or to manipulate variables = secondary less tie consuming
whats weaknesses
thrid variable cause relationship between variables = no controll over evs = decreases valisity of results and cannot claim causation
cannot demo cause and effwect = lack of experimental manipulation = establishing direction is a issue