In a test of a new medication, 65 out of 98 males and 45 out of...
In a test of a new medication, 65 out of 98 males and 45 out of
85 females responded positively. At the 0.05 level of significance,
can we say that the drug is more effective for males?
Researchers want to test the effectiveness of a new anti-anxiety
medication. In clinical testing, 64 out of 200 people taking
medication report symptoms of anxiety.
Of the people receiving a placebo, 92 out of 200 report symptoms
of anxiety. Is the medication working any differently than the
placebo? Test this claim using alpha = 0.05
Perform all steps of Hypothesis testing, including P-Value
reaffirmation test.
Problem 6: Researchers are testing two new cholesterol
medications. Medication is given to some males and females and a
placebo is given to others. The tablesbelow summarize the resulting
HDL cholesterol levels after 8 weeks.
Problem 6a: Is there evidence of effect modification with
medication A? Provide a brief (1-2 sentences) explanation.
Medication A
Women
N
Mean HDL
Std Dev of HDL
New drug
40
35.47
2.45
Placebo
41
38.42
3.42
Men
N
Mean HDL
Std Dev of HDL
New...
A medIV. A medical trial into the effectiveness of a new
medication was carried out. 120 females and 90 males took part in
the trial. Out of those people, 50 females and 30 males responded
positively to the medication. Given below is a contingency table
with the given information filled in. Female Male Total Positive 50
30 Negative 70 60 Total a. What is the probability that a randomly
selected person from the sample is a female? b. What is...
An investigator wants to test the effectiveness of a new weight
loss medication at reducing BMI (kg/m2). Suppose the
following table represents the results from a SRS of individuals
enrolled in the study. Assume a normal approximation is acceptable.
(α=.05)(6 points)
Patient
BMI Pre-Test (kg/m2)
BMI Post-Test (kg/m2)
A
30.5
26.5
B
32.8
28.5
C
35.6
28.4
D
34.7
25.7
E
33.9
29.4
A) What type of test design is this?
B) Write our your null and alternative hypotheses.
H0:µd=____ ,Ha:...
A clinical trial is conducted to test a new medication designed
to lower systolic blood pressure (SBP). Participants are randomly
assigned to receive the new medication or a placebo. The outcome is
clinically significant SBP reduction after 30 days. The data are
shown below. Compute the totals.
Significant Reduction in SBP
No Significant Reduction in SBP
Total
New Medication
44
76
Placebo
21
99
Total
Compute the proportion of participants who experienced a
significant reduction in SBP, given they received...
A standardized test has a scale that ranges from 3 to 45. A new
type of review course for the. test was developed by a training
company. The accompanying table shows the scores for nine students
before and after taking the review course. Use 0.01 significance
level to determine if the average test score is higher for the
students after the review course when compared with before the
course.
Student
1
2
3
4
5
6
7
8
9
Test...
A new study compares the effectiveness of a new pain medication
to an existing pain medication and placebo. Which of the following
best represents the dependent variable and the independent variable
for this study?
The dependent variable is the type of medication dispensed to
the patient and the independent variable is the dosage of the
medication dispensed to the patient.
The dependent variable is a measure of pain experienced by the
patient and the independent variable is a measure of...
You are an experimental psychologist interested in finding out
how effective a new medication might work for treating depression.
Describe a study you might conduct to reach some conclusions on
this matter. Be sure to define and provide examples of the
following terms and concepts, demonstrating your understanding of
each: hypothesis, independent variable, dependent variable, random
assignment of participants, ethical guidelines.
Researchers want to test the effectiveness of a new pain
medication. Four hundred people were recruited to participate in
the clinical trial. In clinical testing, 40 out of 201 people
taking the medication reported pain symptoms. Of the other 199
people receiving a placebo, 20 reported pain symptoms. Combining
the two samples together, what is the overall proportion of those
who reported pain symptoms among all participants?
0.15
0.34
0.47
0.19