PSY1022 Chapter Notes -Percentile, Percentile Rank, Frequency Distribution
Document Summary
Methods that help researchers organise, summarise and simplify the results obtained from studies. Methods that use the results obtained from samples to help. A summary value that describes a sample e. g. average score. Statistical measure that identifies a single store that defines the centre of the distribution. Measure of a spread of scores in a distribution. Measures variability by computing the average squared distance from the mean. Symmetrical, bell-shaped frequency polygon representing a normal distribution. Theoretical frequency distribution that has certain special characteristics. Normal curves that have peaks of medium height and distributions that are moderate in breadth. Normal curves that are tall and thin, with only a few scores in the middle of the distribution having a high frequency. Peak to the left and tail to the right. Peak to the right and tail to the left. Measure of how many standard deviation units an individual"s raw score falls from the mean of the distribution.
