Question

Read the scenario and answer the question that follows: An experiment was set up to study two drugs, Lipanthyl and Befizal, based on their effect on cholesterol level in blood. A group of 25 men with high cholesterol level were randomly assigned one of the two drugs. The level of LDL was measured right before the treatment and again after the 3-month treatment. Suppose we wanted to compare the LDL levels pre and post treatment with Lipanthyl. 1. Would you perform a one-sample t-test, a paired t-test or an independent samples t-test on these data?2. Explain your answer. 3.Write down the explanatory variable and the response variable in this study.

Answer #1

**1. )**

**Answer: A paired t-test**

**Reason**: We are considering only Lipanthyl. The
same patients are measured pre and post treatent. So a paired
t-test

**2.)**

We want to compare difference between mean values of LDL level
measurement for the **same patients taken at two different
times.** Thus the values are matched for every individual in
each sample measurement. Hence, we should use a paired t-test.

**3.)**

**Explanatory Variable: Treatment using drug
Lipanthyl**

**Response Variable: Level of LDL in blood**

**Reason:** We want to find out whether LDL level
in blood is affected by the treatment. Thus, we want to check if
using Lipanthyl affects the LDL level in blood.In this case, the
treatment(or Lipanthyl) becomes independent variable(explanatory
variable) and LDL level becomes dependent variable(response
variable).

Read the scenario and answer the question that follows:
An experiment was set up to study two drugs, Lipanthyl and
Befizal, based on their effect on cholesterol level in blood. A
group of 25 men with high cholesterol level were randomly assigned
one of the two drugs. The level of LDL was measured right before
the treatment and again after the 3-month treatment.
Suppose we wanted to compare the LDL levels of the subjects on
Lipanthyl versus those on Befizal....

2. A study was set up to look at whether there was a difference
in the mean arterial blood pressure between two groups of
volunteers, after 6 weeks of following one of two treatment
programs. One group of volunteers were given an exercise regimen to
follow for the 6 weeks and the other group were given the same
exercise regimen with the addition of an experimental tablet. Which
type of t-test should be used in this situation?
a. One sample...

Read the scenarios 1 and 2 below and identify their type of
study as
Observational, Cohort, Prospective, Cross-sectional,
Retrospective, Case-Control, Randomized experiment, Randomized
block experiment or double-blind experiment.
Some studies may have more than one identifier.
Then, explain why you selected that study type.
Scenario 1: A researcher wants to determine if consuming
oatmeal regularly reduces the level of bad cholesterol. She finds
120 adults over the age of 40 who regularly consume oatmeal in
their daily diets and...

About 480 women took part in a study about the effects of
hormone therapy on middle-aged women; the women were grouped
together in groups of two based on their similarities in height,
weight, age, etc. Then one person in each group was randomly
assigned to hormone therapy, while the other person was assigned to
a placebo (they did not know which). After about a year, blood
tests were conducted on each subject by a lab technician who was
aware of...

Question 16
A researcher conducts a study in which the same participants are
observed across each level of the independent variable. If there
are only two levels of the independent variable, then what type of
t test is appropriate for this study?
a.
There is not enough information to answer this question.
b.
related-samples t test
c.
two-independent-sample t test
d.
one-sample t test

An experiment was conducted for better understanding of the
effectiveness of a particular type of drug for reducing bad
cholesterol (LDL) level. The purpose of the experiment was to
determine whether different dosages used have significant different
outcomes in average LDL reduction. Twenty subjects with LDL at
around 250 to 300 mg/dL had participated in the study and were
randomly divided into four groups. Each group was given a specific
level of dosage of the drug each day for one...

Read the
scenarios 1 and 2 below and identify their type of study
as
Observational, Cohort, Prospective, Cross-sectional,
Retrospective, Case-Control, Randomized experiment, Randomized
block experiment or double-blind experiment.
Some
studies may have more than one
identifier.
Then,
explain why you selected that study type.
Scenario 2:
A school psychologist wants to test the
effectiveness of a new computer method for teaching reading to
first graders. She recruits 400 first grade students in her school
district and randomly divides them into...

Write the corresponding letter of the distribution used to
conduct the test to answer the question or to find the probability
requested in the blank to the left of the given information. You
will only use each letter once.
Student’s T
Standard Normal
Chi-Square
Binomial
Poisson
________________ Researchers want to
study the effect of a new drug on reducing cholesterol levels. A
sample of 500 individuals with high cholesterol were randomly
assigned to one of two groups (placebo, drug). The...

A serum cholesterol level above 250 mg/dl of blood is a risk
factor for cardiovascular disease in humans. At a
medical center in St. Louis, a study to test the effectiveness of
new cholesterol-lowering drug was conducted. One hundred
people with cholesterol levels between 250 mg/dl and 300 mg/dl were
available for this study. Fifty people were assigned at
random to each of two treatment groups. One group
received the standard cholesterol-lowering medication and the other
group received the new drug. After taking the drug...

Match the terms with their definitions. Most of this information
is from the chapters you have read in Cronk so far. They can also
be found in various places throughout your textbook.
Answer Choose...Paired-samples t test, Inferential statistics,
Descriptive statistics, Non-parametric inferential statistical
procedures, Chi-square, Correlation, Independent-samples t test,
Parametric inferential statistical procedure
1) This parametric statistical procedure is used when you have a
dependent variable that is interval (1, 2, 3, 4, .....and so on),
and an independent variable...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 3 minutes ago

asked 4 minutes ago

asked 17 minutes ago

asked 17 minutes ago

asked 21 minutes ago

asked 23 minutes ago

asked 26 minutes ago

asked 26 minutes ago

asked 28 minutes ago

asked 54 minutes ago

asked 57 minutes ago

asked 57 minutes ago