Question

*read the following descriptions of hypothetical studies.
Explain whether each is an experiment, non-experiment, or
quasi-experiment and state why for identifying, and for
explanation).*

1. A coach at a high school wants to examine if reduced practice for athletes caused higher grades. She puts all of the athletes with low grades into the experimental group and reduces their practice time from 2 hours to 1 hour. She puts all of the high-achieving athletes in the control group and keeps their practice time at the normal 2 hours. The coach keeps track of their grades over the next semester. At the end of the semester, the coach compares their grades from before the change and after the change.

2.In a drug trial, patients are randomly assigned to two groups. One group receives the new drug, while the other group receives a placebo that does nothing.

3. For a class project, a student conducts interviews with people in her community in order to study attitudes toward community improvement projects in the area.

4. A researcher has developed a new scale to measure a construct. To see if his scale has higher reliability and validity than an existing one, he randomly selects people to take a survey using his scale, and an equal number of people to take a survey with the old scale.

5. To test whether phone use decreases academic success, a professor compares the grades of students who have used their phones in class to those of students who have never used their phones in class.

6.Belk Gym gives out surveys to students who use the facilities during the month of January to find out how satisfied they feel with the gym and the work out classes offered.

Answer #1

1. This is an example of This is an example of a quasi-experiment because these is no random assignment of groups but the effect of one variable on the other is being studied.

2. This is an example of an experiment because patients are assigned randomly, and there a control and an experimental group.

3. This is an example of a non-experiment study as the study is descriptive in nature.

4. This is an example of a non-experiment because the purpose of the study is to compare two scales and not to establish a causal relationship.

Please post the other questions separately as we are supposed to answer just one question or four sub parts of a question.

Question 7
An educational psychologist studies the effect of frequent
testing on retention of class material. The students are randomly
assigned to one of two sections of an introductory course. In one
section of an introductory course, students are given quizzes each
week. A second section of the same course receives only two tests
during the semester. At the end of the semester, both sections
receive the same final exam. Please choose the statistical test
that is most appropriate for...

The following paragraphs describe
a series of hypothetical experiments, each of which involves one or
more design flaws. Please read the paragraphs and match them to
what went wrong.
options are: demand
characteristics, missing a control group, extraneous variable(s)
present, placebo effect
A group of psychologists wants to determine
whether scream therapy actually helps people feel better. To test
this, they recruit a number of subjects who have recently
complained of extreme nervousness, and they carefully measure their
anxiety using...

Identify which of the following five types of study designs most
appropriately characterizes each of the situations described below.
You may use a particular study design more than once, but give only
one answer per item.
A.
Cross-sectional study
D.
Clinical trial
B.
Case-control study
E.
Community trial
C.
Prospective cohort study
1) Two groups are recruited into the study – one of the groups
is a random sample of all skin cancer...

Subject bias can occur in an experiment when the participants
are aware of the purpose of the study and respond in a way that
they think the researchers want. For example, if participants
believe they are in a study to test if coffee improves your mood,
those who drank coffee might claim to be happier than they really
are.
Based on the information given, which of the following
experiments is most likely to have the issue of a control or...

(Case evaluation, Questions 26-39)
In a study, the researchers were interested in seeing whether if
Ariana Grande’s music can be sexually stimulating to men. The
researchers decided to include male students from Hunter College,
age ranging from 18-20, without pre-diagnosed sexual dysfunctions.
Out of the possible N=10,538 students who meet the criteria for
participation, 200 men were randomly selected by computer to
participate. After having the participants sign the informed
consent, the researchers randomly assigned these subjects into 4...

Match each of the research designs below to the
appropriate statistical test from the list below.
z Test
Single Sample t-Test
Paired Samples t-Test
Independent Samples t-test
One-way Between-Groups Analysis of
Variance
One-way Within-Subjects Analysis of
Variance
Two-way Analysis of Variance
Correlation
You have two nominal independent variables and one scale
dependent variable. For example, you want to know if the various
types of cholesterol drug are more effective at lowering
cholesterol and if this effectiveness is different for men...

What Statistical Test Should I Use
Please indicate the type of test needed to analyze the data
described.
Hints: Think about the IV and DV. How many levels of
the IV? Are they repeated measures? Are the data
categorical?
A. z-test
B. One-Sample t-Test
C. Dependent Measures t-Test
D. Independent Measures t-Test
E. One-way ANOVA
E. One-way ANOVA
F. Post-hoc tests
G. Between-Subjects Factorial ANOVA
H. Chi-Square test of Independence
________ 1. Compare spatial task scores after 0 or 3 drinks....

An experiment was carried out to measure the effect of growth
hormone on girls affected by a growth disorder called Turner’s
syndrome. A total 68 girls participated in the study. Half of the
girls were placed into the treatment group; these girls were given
the active drug. The other half of girls were placed into the
control group and were given a placebo with no active ingredients.
Their heights were measured at the time the hormone was first
administered and...

Question 1 2 pts
Let x represent the height of first graders in a class. This
would be considered what type of variable:
Nonsensical
Lagging
Continuous
Discrete
Flag this Question
Question 2 2 pts
Let x represent the height of corn in Oklahoma. This would be
considered what type of variable:
Discrete
Inferential
Distributed
Continuous
Flag this Question
Question 3 2 pts
Consider the following table.
Age Group
Frequency
18-29
9831
30-39
7845
40-49
6869
50-59
6323
60-69
5410
70...

read Seasons of Love chapter:measuring a child's life
after suicide. please answer the questions : reflect on what
happens to the families when there is a suicide in the family,
based on the Seasons of Love chapter...how should people be told?
What details are best left unshared?
below is the story
These theories may have a certain face-validity, but they often
neglect environmental or contextual factors that are innate to
answering the question of “why” a person might engage in...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 27 minutes ago

asked 33 minutes ago

asked 34 minutes ago

asked 42 minutes ago

asked 54 minutes ago

asked 57 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago