Presentation Grading Criteria
Group _
Note, the presentation must be in PowerPoint (-3 points if not). Also, the
presentation must last between 10-12 minutes. Points will be deducted for short presentations.
1) Overview:
The presentation clearly identifie

Research Design and Analysis (Psy 223) Formulas
THE MEAN
X
=
N
OR
X (M) =
X
n
VARIANCE
Conceptual Formulas:
(X X )
2 =
(X X )
2
s2 =
N
2
n 1
Computational Formulas:
2 =
X
2
( X ) 2
N
s2 =
N
X
2
( X ) 2
n 1
n
STANDARD DEVIATION
= 2 =
X2
( X ) 2
s=
N
Z-SC

1) Tim is a marketing consultant. He noticed that Bozeman does not have much diversity in types
of restaurants. So, he wanted to know what kind of new restaurants people would like here in
Bozeman. Tim randomly approached 88 adults around downtown Bozeman

Sample Problems on One-Way and Repeated-Measures ANOVAs
1. What are the assumptions required to conduct a One-Way ANOVA? Explain each one.
2. To assess the likely truth or falsity of the null hypothesis, we compute two estimates of
population variance. Wh

Practice 2 Factor ANOVAs
1) What are factors (of what can they be composed)?
2) You conduct an experiment in which people are randomly told that they did well or poorly on an IQ test.
After that, participants were randomly assigned to complete an easy tes

1) A student in a Biology class was curious about the relationship between doses of caffeine
students consume before a quiz and the number of correct answers students provide on that quiz.
She asked a sample of 5 current Biology students the number of caf

Sample Problems for Exam 2
1) Assume you have a desk drawer that contains seven pencils, four pens, and five
markers. Calculate:
a. the probability of selecting a pen out of the drawer.
b. the probability of selecting a marker out of the drawer.
c. the pr

Worksheet: , One Sample, Independent-Sample and Repeated-Measures t-tests
1) A child Psychologist hypothesized that adolescent girls who put off dating (late daters)
until they are past 16 have higher self-esteem than do adolescent girls in the general
po

Sample Problems for
Exam 1
1. Given the following data set, answer the following questions below.
1
1
2
2
3
4
4
5
6
8
1A. Complete the grouped frequency distribution. (5 points)
Limits Midpoint
1-2
1.5
Frequency
Cumu. Freq
Rel Freq
Cumu. %
3.5
5.5
7.5
1B.