PSYB01H3 Chapter Notes - Chapter 10: Analysis Of Variance, Contingency Table, Type I And Type Ii Errors
Document Summary
Statistical approach: descriptive statistics: describe variables in a study; one at a time and in relation to another. Inferential statistics: used to estimate characteristics of a population from those found in a random sample of the population; can be used to test hypotheses about the relationship between variables; likelihood of results due to chance. Levels of measurement matters: nominal, ordinal, interval, ratio: determines which ties of statistic analyses you can use (see chapter 4) Univariate distributions: univariate distribution: a probability or frequency distribution of only one variable. Graphing: to depict frequency distributions: bar chart: solid bars separated by spaces; good for nominal level, histogram: shows frequency distribution of a quantitative variable. Begin graph of quantitative variables at 0 on both axes; can break this rule at times ex. Age distribution of adults; should show break clearly. Two axes should be of approximately equal length. Done have chart "junk" that can obscure distribution shape.
