Psychology 1000 Chapter Notes -Null Hypothesis, Normal Distribution, Factor Analysis
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PSYCH 1000 Full Course Notes
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Descriptive statistics: descriptive statistics: summarize and describe the characteristics of a set of scores, frequency distribution: shows how many participants received each score, histogram: graph of frequency distribution. Normal curve: normal curve: symmetrical bell-shaped curve that represents a theoretical distribution of scores in a population. The correlational coefficient: pearson product-moment correlational coefficient is a statistic that reflects the direction and strength of the relation between two variables. Factor analysis: factor analysis reduces a large number of correlations among many measures to a smaller number of clusters, with each cluster containing variables that correlate highly with one another.