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Lecture 6

PSYCH 100A Lecture Notes - Lecture 6: Standard Deviation, Central Tendency, Analysis Of Variance


Department
Psychology
Course Code
PSYCH 100A
Professor
Reise Steven
Lecture
6

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Thursday, January 23, 2020
Psych100A Week3
Lecture3-2!
-Descriptive Statistics!
Central tendency of scores in a distribution !
-Mean!
The balancing point!
a “good” estimator of its corresponding population value!
Takes into account every score!
-BUT, highly influenced by outliers if small n!
a least squares estimator!
-The sum of the squared dierence between scores in a distribution and the
mean is as small as possible!
-median!
-mode!
Variability of scores in a distribution!
-Sum-of-Squares!
-Variance and standard deviation!
-range!
Max – Min!
Appropriate for ordinal, interval/ratio!
1
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