Question

An experiment was done to test the effectiveness of a drug that
is being considered for possible use in the treatment of people who
experience chronic anxiety. Fifty people who are chronically
anxious are identified through a local health clinic. Twenty-five
people are randomly assigned to the experimental group, and they
receive the new drug for six weeks. The other 25 people are
randomly assigned to the control group, and they receive the
commonly used drug for six weeks. After the treatment period, the
participants provide a self-rating on a 20-point scale indicating
the level of anxiety they are experiencing (higher scores indicate
greater anxiety). The mean self-rated anxiety in the experimental
group was 10.2 (*SD* = 1.5), and the mean rating in the
control group was 13.5 (*SD* = 2.0). The .95 confidence
interval for the mean self-rating in the experimental group was 9.6
to 10.8. The .95 confidence interval for the control group was 12.7
to 14.3

Question 1

What is the independent variable in this experiment?

Question 2

What are the levels of the independent variable?

Question 3

What is the dependent variable in the experiment?

Question 4

How would you describe the effect of the drug variable on anxiety ratings using the means for each condition?

Question 5

What claim would you make based on the estimates of the population means for the two groups in this experiment based on a comparison of the confidence intervals?

Question 6

The probability associated with the null hypothesis test for the
difference between the two groups was *p* = .01. What claim
would you make about the effect of the treatment based on this
probability?

Question 7

The effect size for this experiment is *d* = .37. What
information does this effect size tell you about the effectiveness
of the drug?

Answer #1

- ANSWER 1 and 3-The independent variable is the drug being tested to study its effect on chronic anxiety of participants which is the dependent variable.(effect)
- Since,the drug is being controlled and given by the experimenter it is an independent variable.
- ANSWER 2 -There are two levels of the independent variable since,the experiment is comparing an experimental treatment with a control treatment, then the independent variable (type of treatment) has two levels: experimental and control.
**Due to time limit,remaining questions can be asked as another question,they will be answered,thankyou for your cooperation**

An experiment was done to see the effects of diet and a drug on
Type II Diabetes in men in the 50’s. Men in the 50’s who were
diagnosed with Type II Diabetes that was under moderate control
were randomly selected and randomly assigned to one of 4 treatment
groups (8 per group). The groups were a Control group, those given
a special diet, those given the drug, and those given the diet and
the drug. The control group was...

A clinical trial is run to investigate the effectiveness of an
experimental drug in reducing preterm delivery to a drug considered
standard care and to a placebo. Pregnant women are enrolled and
randomly assigned to receive either the experimental drug, the
standard drug or a placebo. Women are followed through delivery and
classified as delivering preterm (< 37 weeks) or not. The data
are shown below. (HINT: expected frequency for preterm delivery
should be consistent across the three groups –...

Assume that you are conducting an experiment in human
performance. You have two groups: experimental (the group that
receives the treatment) and control (the group that does not
receive the treatment). What steps would you take to make a
decision about the effectiveness of your experimental
intervention?

A pharmaceutical company performs an experiment to test a new
drug against Coronavirus (SARS2-COV). Their scientists
predict that this drug will reduce the length of hospital stay for
patients, compared to the current standard
treatment. One group of patients (Group A) is given the
new drug. One group of patients (Group B) is given the
current standard treatment. The average length of
hospital stays were as follows: Group A: 6
days. Group B: 11 days.
What is the hypothesis?
What is the control?
What is the...

A nutritionist wants to conduct a study to validate the
effectiveness of a certain herb as an aid in weight loss. She has
her nurse randomly assign half a group of overweight people to
receive the herb with instructions on how to take and a planned
diet for six weeks. The other half of the group is given parsley
(which they think is the herb) with the same instructions and the
same diet. Each participant is assigned a number and...

Q3. A clinical trial
is run to investigate the effectiveness of an experimental drug in
reducing pre-term delivery to a drug considered standard care and
to placebo. Pregnant women are enrolled and randomly assigned to
receive either the experimental drug, the standard drug, or
placebo. Women are followed through delivery and classified as
delivering pre-term (< 37 weeks) or not. The data are shown
below.
Pre-term Delivery
Experimental Drug
Standard Drug
Placebo
Yes
20
32
36
No
80
68
64...

A clinical trial was conducted to test the effectiveness of a
drug for treating insomnia in older subjects. Before treatment, 25
subjects had a mean wake time of 105.0 min. After treatment, the
25 subjects had a mean wake time of 78.1 min and a standard
deviation of 21.4 min. Assume that the 25 sample values appear to
be from a normally distributed population and construct a 99%
confidence interval estimate of the mean wake time for a population
with...

A clinical trial was conducted to test the effectiveness of a
drug for treating insomnia in older subjects. Before treatment, 16
subjects had a mean wake time of 101.0 min. After treatment, the
16 subjects had a mean wake time of 79.7 min and a standard
deviation of 23.9 min. Assume that the 16 sample values appear to
be from a normally distributed population and construct a 95%
confidence interval estimate of the mean wake time for a population
with...

A clinical trial was conducted to test the effectiveness of a
drug for treating insomnia in older subjects. Before
treatment,
23 subjects had a mean wake time of 101.0min. After treatment,
the 23 subjects had a mean wake time of 76.6
min and a standard deviation of 22.9min. Assume that the 23
sample values appear to be from a normally distributed population
and construct a
95% confidence interval estimate of the mean wake time for a
population with drug treatments....

A clinical trial was conducted to test the effectiveness of a
drug for treating insomnia in older subjects. Before
treatment,1313 subjects had a mean wake time of
103.0103.0 min. After treatment, the 1313 subjects had a mean
wake time of 93.893.8 min and a standard deviation of 20.220.2 min.
Assume that the
1313 sample values appear to be from a normally distributed
population and construct a 9999% confidence interval estimate of
the mean wake time for a population with drug...

ADVERTISEMENT

Get Answers For Free

Most questions answered within 1 hours.

ADVERTISEMENT

asked 25 minutes ago

asked 34 minutes ago

asked 34 minutes ago

asked 1 hour ago

asked 1 hour ago

asked 2 hours ago

asked 2 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago

asked 3 hours ago