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....

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Question 16
A researcher conducts a study in which the same participants are
observed across each level of the independent variable. If there
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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

Write the corresponding letter of the distribution used to
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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
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Some studies may have more than one identifier.
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