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PSYC 300A Cheat Sheet (DRAFT) by

This is a cheat sheet for my UVIC Stats 300A Exam #2

This is a draft cheat sheet. It is a work in progress and is not finished yet.

Correl­ations

Bivariate descri­ptive statis­tics: Two variables
Univariate descri­ptive statis­tics: One variable
∑(x-x̅)2 = Minimum
Correl­ation: Measures the direction and degree of linear Relati­onship between two variables
Linear Relati­onship: When the relati­onship between two variables can be most accurately repres­ented by a straight line
Y = bX+a
a = Y intercept (i.e., value of Y when X = 0)
 

Formulas

Y = bX + a
Equation of the line
Mean X̄
∑X/N
Deviation score
(X-X̄)
Squared deviation score
(X-X̄)2
Sums of squares (SS)
∑(X-X̄)2
Variance (SD2)
SS/N
sample size
N
Standard deviation (SD)
√SD2
Sum of products (SP)
∑(X-X̄­)(Y-Ȳ)
Covariance (Cov)
SP/N
 
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