1.
What point on the normal curve represents the most commonly occurring
observation?
a. The highest point or the mean.
2.
What point is the average?
a. The highest point, which is also the most common score.
3.
What point is the median?
a. The highest po
Chapter 1
Type of Scales
When most people think of measuring something, they likely think of things relating to physical
size like height, distance, and square footage. However, measurement can mean different
things. The most common way to measure somethi
Chapter 4 Study Design
Study design/research methods is often a topic covered as its own class in many university
programs. However, it overlaps to such a large degree with statistics that it is impossible to
cover one and not the other. While statistics
Introduction
Lies, damn lies, and statistics
Benjamin Disraeli via Mark Twain (and others)
Most of us have heard the phrase numbers dont lie. Yet, depending on how, why, and who is
presenting them, numbers can be very misleading.
Therefore, it is importan
PSY 200 MIDTERM PREP
Layout and Topics
LAYOUT
Three Sections:
1. Short answer
some T/F,
2. some Multiple Choice
3. some fill in the blank
1.
2.
3.
Scenarios - Read three descriptions of
research studies and answer questions
about each one
Excel Problems v
Week 3 Assignment
Due February 5th, 11:59pm
1) Answer and send me the following (1 point each):
a. Describe the three measures of central tendency (mean, median, and mode).
Mean- the average is the sum of the data entries divided by the number of entries.
Week 1 Assignment
Due January 22nd, 11:59pm
1) Send me answers to the following questions.
a. What is the difference between a sample and a population (1 point)?
Population is all the target participants, sample is a smaller selection of the
population.
b
Week 2 Assignment
Due January 29th, 11:59pm
Answer the following questions (1 point each)
1) Identify and define four types of scales that researchers use to quantify their observations.
Nominal -Measurement scale in which numbers serve only as labels and
Week 4 Assignment
Due February 12th, 11:59pm
1) Describe at least three advantages of z-scores (1/2 point).
Clarity- puts scores on a common metric
Comparison- can use to control for different compound
Help to identify outliners critical value is usual
Grand Mean Group Mean Diff. Group &Grand Squared
204.91666667
122
-82.92
-82.92
-82.92
-82.92
Family 1
45
211
158
74
Family 2
92
128
382
200.66666667
-4.25
-4.25
-4.25
Family 3
273
296
178
248
374
273.8
68.88
68.88
68.88
68.88
68.88
Diff X & Group Squared
Independent - Samples t-test Homework
Dr. Stretch Armstrong has developed a physical therapy treatment that he believes will
significantly reduce recovery time for patients with a certain type of elbow injury. There is NO
previous research to support the
Paired - Samples t-test Homework
Suppose that you are a manger considering implementing a new training program designed to
increase work performance in employees. No previous research has been conducted. Before you
commit to implementing the training in y
One Sample t-test Homework
A manufacturer of light bulbs advertises that on average, their 75watt bulbs have lifespan of 750
hours ( = 750). The population standard deviation is NOT known. Suppose a random sample
of bulbs was taken (n = 12) and they were
Basic Example of Type I and Type II Error
Imagine you are a doctor and rely on a test that uses a sample of ones blood
cells to determine if that person has STATS disease. The problem is that
sometimes the test:
(a) Indicates a person does have STATS dise
Paired - Samples t-test Homework
Suppose that you are a manger considering implementing a new training program designed to
increase work performance in employees. No other companies have used this particular training
program. Before you commit to implemen
Over the past few years, researchers gathered data on every transaction at Starbucks
coffee shops in several U.S. cities. They determined a population mean of 247
calories in products purchased by customers at stores without calorie postings. The
standard
Chapter 5
Name _
1. For each of the following, (a) state which two populations are being compared, (b) state the
research hypothesis, (c) state the null hypothesis, and (d) say whether you should use a onetailed or two-tailed test and why.
In an experimen
Manuel, a 15-year old boy in a recruited class, is 61.20 inches tall (about 5 feet, 1 inch).
For boys, the mean height is 67 inches, and the standard deviation for height is 3.19
inches.
1. Convert his raw score to a z score.
61.20-67/3.19 = -1.82
Look -1
Paired-Samples t-Test Practice Problem
(repeated-measures)
Summary
Lets imagine that we are researchers and we want to test a
therapy method to see if it will reduce or increase ones phobia of
spiders (arachnophobia).
Overview of the Pre-test posttest Des
Paired-Samples t-Test Practice Problem
(repeated-measures)
Summary
Lets imagine that we are researchers and we want to test a
therapy method to see if it will reduce or increase ones phobia of
spiders (arachnophobia).
Overview of the Pre-test posttest Des
Chapter 7
Name _
A researcher is interested in whether people are able to identify emotions correctly when they are extremely tired.
It is known that, using a particular method of measurement, the accuracy ratings of people in the general
population (who
One Sample z-test Homework
The university president is interested in determining how his college seniors compare to the
national average when it comes to the University Exit Exam (which you will all have to take one
day). The Exit Exam has a = 100 and = 2
Basketball Grip Example
(Matched Pairs)
Research Question: Does free throw shooting camp make a
difference
in ability to shoot free throws? Previous research suggests that this one-day camp
really helps players shoot free throws better. Participants were
Practice Problem: House Keeping SKILLZ
In Good House Keeping Magazine there was a quiz that tests housekeeping
skills.
You know housekeeping skills, likevacuuming skills, dinner cooking skills,
gardening skills
If only women took this quiz and their nati
Person
Holly
Grace
Michelle
Karen
Jesse
Jermey
David
Andrew
Patrick
Damon
Caitlin
Courtney
Andre
Justin
Chris
Jamie
Saly
Mackenzie
Payton
Brooke
Rachel
Kelsey
Jacquelyn
Laura
Devon
Bailey
Carmen
Kevin
Norman
Bonnie
Shelby
Subject #
Gender
1F
2F
3F
4F
5M
6
Holliann Bolin
1)
Identify and define four types of scales that researchers use to quantify their
observations.
a. Nominal- categorizing
b. Ordinal- like a ranking system
c. Interval- can have both positive and negative
d. Ratio- has to have an absolute z