PSYC 2101 Lecture Notes - Lecture 14: Statistical Inference, Binomial Test, Descriptive Statistics
Document Summary
Variables: nominal variables (categorical) no numerical or quantitative properties. If no, your variable is nominal: descriptive statistics, percentages, mode. Inferential statistics: chi square, binomial test, ordinal variables order the data in terms of rank or magnitude. (rank in army, mathematical property- identity and magnitude, descriptive statistics, percentile, median. Interval variables- indicate ranks, but also have equal intervals between the values. (temperature, etc. : mathematical property- equal intervals, identity, magnitude, descriptive statistics, range, mean, standard. Inferential statistics: product-moment, ratio variables- everything interval variables do plus a true zero point. Temperature might have 0 but that does not mean an absence of temperature (weight, length, time: mathematical properties- identity, magnitude, equal intervals, and true zero point, descriptive statistics, geometric mean, harmonic mean. Inferential statistics: coefficient of variation, likert variables- response options vary from low to high. How often have you been treated rudely- 1 = not at all 7= all the time.
