PSYCHOLOGY 293
EXAM 2 FORMULA SHEET
Z-FORMULA FOR COMPARING A RAW SCORE TO A POPULATION MEAN:
z=
X
Z-TEST FOR ONE-SAMPLE MEAN:
z=
X
x
where, X =
or
n
=
2
n
T-TEST FOR ONE-SAMPLE MEAN:
t=
X
s
where, s X =
sX
n
or
=
s2
n
df = n-1
s D2
n
df = n-1
RELATED-
PSYCHOLOGY 293
EXAM 3 FORMULA SHEET
CONFIDENCE INTERVALS:
Based on z
where, X
X z X
=
n
or
Sums of Squares:
Degrees of
freedom:
=
SStotal = SSgroup + SSerror
2
n
dfgroup = k - 1
Based on 1-sample t
X ts X df = n 1
dferror = N k
s
or
n
TWO-WAY ANOVA
(CON
PSYCHOLOGY 293 EXAM 1 FORMULA SHEET
=
X
N
X
X
n
=
z=
X
Range: Xmax - Xmin
X = z
Finding Quartile locations:
(median location +1) / 2
TSS = new + z new
IQR (H-SPREAD) = Q3 Q1
Maximum lower whisker =
Q1 (1.5)(IQR)
Median: Finding center location: (n+1) / 2
How to perform analyses in SPSS
Part I: What you need to know for the quiz
1. One and two way ANOVAS
Analyze General Linear Model Univariate
*IV(s) go in Fixed Factor box
*under Options you can get descriptives
*under Post Hoc you can conduct LSD tests
*c
EXAM
2 REVIEW SHEET
PART CHAPTER 8 & PART CHAPTER 12: DISTRIBUTION OF SAMPLE MEANS
Understand conceptually the distribution of sample means (DSM)
Understand conceptually the Standard Error of the mean and how it is different from the standard deviation
Un
REVIEW SHEET FOR FINAL EXAM
CHAPTERS 1-20
NEW MATERIAL: CHAPTER 19: CHISQUARE
Understand the distinction between
categorical and quantitative
variables
Understand when/why you would use a
goodness-of-fit chi-square test
versus a contingency-table analysis