Psyc 214: Applications of Statistics - Dr. Zyzniewski
Exam 1 Review
Be able to read a paragraph about a study and identify.
. the variables (and whether each is qualitative or quantitative)
. the IV and DV
For a given variable, know which type of table/gr
Practice Handout for One-Sample z-test
A test is conducted for H0: = 34, with = 5. A sample of size of 100 is selected.
Calculate the standard error of the mean /N = 5/100 = .50
The label on bottles of water reads 12.0 oz. ( = 0.2). After sampling 64 bott
Name: _
VCU e-ID:[email protected]
TA Name (circle yours): Annie Bays Ashlee Sawyer
Section 001
Section 002
Section 003
Section 004
PSYC 214: Dr. Bregman - Monday lecture, Fall 2014
Assignment 1 (Due in class at 12:00 on Monday, 9/15)
Late penalty for unexcused a
Name: _
VCU e-ID:[email protected]
TA Name: _ Circle your section: 01
04
02
03
PSYC 214: Dr. Bregman - Monday Lecture, Fall 2014
Assignment #2 (Due at the beginning of class on Monday, 9/22)
Late penalty for unexcused assignments:20 points off, no later than 4:00
PSYC 214 PRACTICE PROBLEMS FOR STANDARD SCORES
An educational psychologist working with inmates at a juvenile corrections facility wants to
know the intelligence level of the facilitys population. She does this so three distinct curricula
can be establish
PSYC 214, Fall 2015
Descriptive statistics, normal distribution and
standard scores
1
Consider the meaning of these measurements:
510 on the SAT 1 math section
32 on a measure of cognitive ability
"Good" as your performance rating
In studies of behavio
PSYC 214: Applications of Statistics
Dr. Zyzniewski
Example # 2
An organizational psychologist hypothesizes that people are becoming more "social" at work.
In short, she sees fewer jobs where the employee works alone on the assembly line and sees more job
Population Parameter Estimation
and
Sampling Distributions
(Chapter 7);
Hypothesis Testing
(Chapter 8 sections 8.1-8.4; 8.7-8.8)
Inferential Statistics: Using sample statistics to
estimate population parameters.
Estimating population mean
x-bar is our "be
Psyc 214 Exam 1 review sheet answers
1. C
one quantitative variable (score on 100 point exam) and one qualitative variable (bedtime)
IV: bedtime (qualitative) DV: score on 100 point exam (quantitative)
2. C
grouped interval histogram
C is the *best* answe
PSYC 214 Lab 3 Worksheet
Frequency distributions and Descriptive Statistics
Professor John Doe is new to VCU and wants to know more about VCUs students.
Specifically, he wants to know how externalizing behaviors (i.e., delinquency, drug use,
aggression) a
Psyc 214: Exam 1 Review
Note: This is not intended to be an exhaustive list of concepts and problems!
For practice and review, here are some examples. We will discuss the answers in lab.
1. Identify the type of measurement being used for each variable (no
Lab 6 Overview:
Review for exam
A Review
1. A test is conducted for H0: = 34, with = 5. A sample of
size of 100 is selected. Calculate the standard error of the
mean.
2. The label on bottles of water reads 12.0 oz. ( = 0.2). After
sampling 64 bottles with
Exam 1 Review
Bring text, notes, handouts, assignments, pencils
(sharpened), and calculator.
Chapters 1, 2, 3, 4, 7, 8.1-8.4, 8.6-8.8
Everything listed on the review sheet is fair
game, meaning topics/procedures not listed
will not be asked!
Ill post the
PSYC 214: Applications of Statistics
Dr. Zyzniewski
Example # 3 Hypothesis Testing: One Sample when is known
Scores on the Graduate Record Exam (GRE) have a mean of 500 and a standard deviation of
100. A researcher believes that a study technique in which
PSYC 214: Applications of Statistics
Dr. Zyzniewski
Example # 4 Hypothesis Testing: One Sample when is unknown
A researcher believes that Americans are generally more satisfied with their lives now as
compared to five years ago. In order to investigate th
Lab 5 Overview:
Descriptive vs. Inferential Statistics
Sampling Error
Sampling Distribution of Means
Central Limit Theorem
Standard Error of the Mean
Hypothesis Testing
One-sample Z-test
A Review
1. Find percent of cases between z = -.38 and z = 1.
PSYC 214: Applications of Statistics
Dr. Bregman
Handout # 5 Independent Groups t-test
An engineering psychologist suspected that audio distractions affect a person working on a visual
vigilance task and lower the person's performance. The psychologist is
PRACTICE PROBLEM: One sample t-test
A researcher believes that prison inmates are generally more depressed than the general
population. In order to investigate this issue, the researcher administers the Beck Depression
Inventory to a random sample of 65 p
Appendix B: Proportions of Scores in a Normal Distribution
This table shows the proportions of scores in a normal distribution that occur within selected
ranges of z. The shaded portion in each figure is the portion of the distribution that is of interest
Lab 1 overview
Take attendance
Welcome to Psyc 214
Review Syllabus
Review Honor System Policy
Review Introductory Concepts
Introduction to SPSS
SPSS task for bonus points!
Who is everyone?
Contacting Me
Name: CJ Alderson
Office Hours: Mondays 12:00pm-4:00
Lab 3 overview
Normal Distributions
Percentiles
Standard Scores
Appendix B
Examples and Practice
Group practice/review quiz
We have asked 50 VCU students to report
the number of U.S. states they have lived in,
resulting the following dataset:
1, 3, 7, 2,
PSYC 214
Applications of Statistics
Dr. Linda Zyzniewski
Fall, 2015
1
Lecture:
Labs:
Section
907
908
909
910
Tuesdays, 7:00-8:40 MCALC 2101
Thursdays, Hibbs B-005
Time
1:00-2:40
3:00-4:40
5:00-6:40
7:00-8:40
TA
Ashlee
Ashlee
CJ
CJ
2
Course D
PSYC 214 Applications of Statistics
Dr. Zyzniewski
Example # 1
Data for a random sample of 30 people chosen from the list of all people who were tested and evaluated at the Institute of
Psychology Clinic during a certain year are reproduced below. The inf
Practice Handout for One-Sample z-test
A test is conducted for H0: = 34, with = 5. A sample of size of 100 is selected. Calculate the
standard error of the mean:
The label on bottles of water reads 12.0 oz. ( = 0.2). After sampling 64 bottles with a
x
=
1
Lab 7 overview
Type I and Type II errors
One-sample t-tests in SPSS
Type I and II Errors
Type I: incorrectly rejected H 0
Difference is actually due to sampling
error/experimenter error and we are
incorrect
Type II: incorrectly failed to reject H 0