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PSYC 2310 (266)

Dynamics of Behaviour Appendix

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PSYC 2310
Anneke Olthof

Appendix - Descriptive statistics- summarize and describe the characteristics of a set of scores - Frequency distribution- shows how many participants received each score o Shows certain characteristics of the data - Histogram- graph of a frequency distribution - Measures of central tendency- describe a distribution in terms of a single statistic that is in some way typical of the sample as a whole o Mode- most frequently occurring score o Mean- the average of a set of scores (adding up all the scores and dividing by the number of scores) o Median- point that divides the distribution in half when the individual scores are arranged from lowest to highest - Measures of variability- provide information about the spread of scores in a distribution - Range- difference between the highest and lowest score in a distribution - Deviation score- measures the distance between each core and the mean - Variance- the average of the squared deviation scores about the mean - Standard deviation- square root of the variance - Normal curve- symmetrical bell-shaped curve that represents a theoretical distribution of scores in the population o 50 percent of the cases fall on each side of the mean and the median and mode have the same value as the mean o Standard deviation can be used to divide the normal curve into the areas containing known percentages of the population o Estimate the probability that a given event will occur - Total amount of variation in
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