PSYC 3020 Chapter : Ch 5
Document Summary
Chapter 5 how do users interpret test scores: levels of measurement (compare your child"s test scores with another"s or other schools, etc, levels of measurement: the properties of the numbers used in a test- nominal, ordinal, equal. #"s assigned to arrange things in a series. Stem and leaf plot is like a frequency distribution but turned on it its side: interpreting test scores: normal curve, normal curve: a symmetrical distribution of scores that, when graphed, is bell-shaped. Grade distribution for easy class could be negatively skewed). See page 122, read about bimodal distribution: interpreting test scores: raw scores, descriptive statistics: describe or summarize a distribution of test scores numerically, include, central tendency. If the data are normally distributed, it doesn"t matter which measurement of central tendency we use. If the data are skewed in one direction of another, the mean is not appropriate to use.
