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Final

# Formulas for Final exam.docx

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Wilfrid Laurier University

Psychology

PS295

Lawrence Murphy

Winter

Description

Formulas you will be given on the Final exam.
X X
X Median location = (N+1)/2
N N
2
2 2 X 2
2 X X 2 X N 2 X
s s
N 1 N 1 N
2
2 X
X X 2 X X 2
s s N
N 1 N 1 N
2 2 2 SS
SS (X X ) SS s (n 1) s
N 1
x X X
z z
s
X X
z X
X N N
X X S
t S df = n - 1
S S X N
X N
D 0 D 0 SD
t S SD df = n - 1
SD D N
N
t X 1 X 2 X 1 X 2
S 2 2 S2 S2
X1X2 S1 S2 S 1 2 df = 1 +2n - 2
n n X12 n1 n2
1 2
2 2
X 1 X 2 X 1 X 2 2 (n11)(S1)(n 21)(S 2
t 2 2 Sp df = 1 +2n – 2
Sp Sp 2 1 1 n1n 22
Sp
n1 n2 n1 n2
CI.95X t .05)x CI.99X t .01)x SS within
SS withinSS j dfwit

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