PSYC 217 Lecture Notes - Lecture 19: Normal Distribution, Minimax, Central Tendency
Document Summary
Learning objectives: describe why we used descriptive statistics, calculate and interpret a mean, median, and mode, explain how the mean is affected by outliers, and how sample size influences how much it is affected. Interpret the standard deviation: describe why variance is calculated. Interpret a squared correlation coefficient: compare and contrast regression and correlation. Mode: (cid:374)ot affe(cid:272)ted (cid:271)y outliers as it"s the (cid:373)ost (cid:272)o(cid:373)(cid:373)o(cid:374) s(cid:272)ore that appears so when there is an outlier, the mode is readily observable and mean the is not reflective of the actual sample size. The mean is especially affected by sample size, as each extreme score has less of an effect on the mean. To maximize usage of data points, use all 3 measures of central tendency. You have to check whether or not there is an outlier in a small sample size try to aim for a large sample as the first step.
