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PSYC 2530 (16)
Lecture

Ch. 3 - Central Tendency.pdf

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Department
Psychology
Course
PSYC 2530
Professor
Anne Russon
Semester
Fall

Description
Ch. 3 - Central Tendency Wednesday, September 12,4:47 PM CentralTendency- Whatit lookslike Whatelseit'sgoodfor StatisticalwaystomeasureCT Mean x Arithmetic mean - Median Mdn 50% of scores above, 50% below Mode Mo The most common value Themean - Balance point, centroid, "average - Calculation ○ Sum of all values / # of values summed  - Notation: ○ Sample (statistics) : X, X(subscript), X-bar, N ○ Population (parameters) : σ, η - Whenthemeanis notsogood… - Frequencydistribution is very skewed - Frequencydistribution has extreme scores ** mean is not central ** - Data are record
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