PS101 Chapter Notes - Chapter 3: Midbrain, Hypothalamus, Cerebellum
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Descriptive statistics: used to give basic information about variable results, des(cid:272)ri(cid:271)e (cid:862)peak(cid:863, measures of central tendency, des(cid:272)ri(cid:271)e (cid:862)spread(cid:863, variance, standard deviation, range. Correlation compared vs descriptive methods: more rigorous and controlled, empirical measurement and statistical analysis, describe magnitude and direction of relationship, positive vs. negative correlations, still no causation. As one variable goes up, the other does too. (e. g. , study time and grades) Increase in one variable and a decrease in another. (e. g. , as exercise increases, depression decreases. Reading correlation graphs: data point, scatterplots, angle of line, reflects correlation. Because you can have access to two pieces of information but may not be able to manipulate the variables directly. It is the first step in the inferential process. Lots of different tests selected on the basis of the characteristics of the study: e. g. , t-test, analysis of variance, etc, try to determine if the results are due to chance or not, statistical significance- relia(cid:271)le (cid:374)ot (cid:862)i(cid:373)porta(cid:374)t(cid:863)
