PSY 250 Chapter Notes - Chapter 7, 14: Random Number Table, Multistage Sampling, Snowball Sampling
Document Summary
Data matrix: data entered in a grid format using a computer program. Frequency distribution: a table that gives a visual picture of the observations on a particular variable. Frequency histogram: a graph created from a distribution of frequency. Central tendency is made up of the mode, median and mean. Standard deviation: the calculation of how far each score is from the mean. Variance is the standard deviation squared. z-score: describes whether an individual score is above or below the mean and how far it is from the mean, in standard deviation units. Coefficient r: a statistical computation that captures the direction and strength of a relationship. Cohen s d: describes the effect size in terms of how far apart the two means are in standard deviation units. d=m1-m2/sd(pooled) Cluster sampling: clusters of participants within a population of interests are randomly selected and then all individuals in each selected cluster are used.
