PSY 2810 Lecture Notes - Lecture 1: Interquartile Range, Central Limit Theorem, Convergent Validity
6 Nov 2016
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Document Summary
Central tendencies gives us a value that summarizes the midpoint of the distribution: distribution with the same central tendency can have different degrees of variability, we want to identify the degree of variability of the distribution. We need to compare the conditions to do this. Retest reliability is where we measures the exact same thing multiple times. Psychology can be very hard to keep consistent, so we just want noise: ex. ) Messy measurements = noise that is added to the data consistent patterns despite variability. People can vary for many reasons throughout a study. Convergent validity and adding items to improve the exhaustively. True score an actual value that we would get every time if there were no. Central limit theorem as a sample size increases, our measurements. Statistics goal determent if the means are different enough given the. Ranges a measure of variability that says how wide the distribution is. We often separate outliers from box and whisker plots.
