Question
In: Statistics and Probability
A sleep disorder specialist wants to test the effectiveness of a new drug that is reported...
A sleep disorder specialist wants to test the effectiveness of a new drug that is reported to increase the number of hours of sleep patients get during the night. To do so, the specialist randomly selects nine patients and records the number of hours of sleep each gets with and without the new drug. The results of the two-night study are listed below. Using this data, find the 99% confidence interval for the true difference in hours of sleep between the patients using and not using the new drug. Assume that the hours of sleep are normally distributed for the population of patients both before and after taking the new drug.
| Patient | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
|---|---|---|---|---|---|---|---|---|---|
| Hours of sleep without the drug | 4.4 | 6.6 | 5.7 | 2.2 | 5.1 | 3.1 | 6.1 | 2.8 | 6.8 |
| Hours of sleep with the new drug | 7.3 | 8.3 | 8.4 | 3.7 | 6.6 | 5.3 | 6.8 | 5.2 | 7.8 |
Step 4 of 4 :
Construct the 99% confidence interval. Round your answers to two decimal places.
Solutions
orchestra answered 2 years agoRelated Solutions
A sleep disorder specialist wants to test the effectiveness of a new drug that is reported...
A sleep disorder specialist wants to test the effectiveness of a
new drug that is reported to increase the number of hours of sleep
patients get during the night. To do so, the specialist randomly
selects nine patients and records the number of hours of sleep each
gets with and without the new drug. The results of the two-night
study are listed below. Using this data, find the 99% confidence
interval for the true difference in hours of sleep between...
A sleep disorder specialist wants to test the effectiveness of a new drug that is reported...
A sleep disorder specialist wants to test the effectiveness of a
new drug that is reported to increase the number of hours of sleep
patients get during the night. To do so, the specialist randomly
selects nine patients and records the number of hours of sleep each
gets with and without the new drug. The results of the two-night
study are listed below. Using this data, find the 90% confidence
interval for the true difference in hours of sleep between...
To test the effectiveness of a new drug, a researcher gives one group of individuals the...
To test the effectiveness of a new drug, a researcher gives one
group of individuals the new drug and another group a placebo. The
results of the study are shown here. At α = 0.10, can the
researcher conclude that the drug is effective? Use the P value
method.
Medication
Effective
Not Effective
Obs.,
Exp
Obs., Esp
Drug
32
9
Placebo
12
18
11. The Scheffe test Sleep apnea is a sleep disorder characterized by pauses in breathing during...
11. The Scheffe test
Sleep apnea is a sleep disorder characterized by pauses in
breathing during sleep. Children with sleep apnea have behavior
problems, including hyperactivity, inattention, and aggression, as
well as impaired learning and diminished academic performance. The
removal of tonsils and adenoids that are enlarged, causing the
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A clinical psychologist studies the effects of tonsillectomy and
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7. You plan to conduct an experiment to test the effectiveness of Sleepze, a new drug...
7. You plan to conduct an experiment to test the effectiveness
of Sleepze, a new drug that
is supposed to reduce insomnia. You have a sample of 100
subjects.
a. Why is it important to include a placebo in this experimental
design?
b. Describe how you can make this a completely randomized
experiment.
c. What is “blinding” and how might it be used in this
experiment?
d. Why is it important to use blinding in this experiment?
To test the effectiveness of a new drug, a researcher gives one group of randomly selected...
To test the effectiveness of a new drug, a researcher gives one
group of randomly selected individuals the new drug and another
group of randomly selected
individuals a placebo. The results are shown in the table
below.
Drug 32 (effective) 9 (ineffective)
Placebo 12 (effective) 18 (ineffective)
At 0.05, can the researcher conclude that the drug results
differ from those of the placebo? (Show ALL steps including
conditions).
To test the effectiveness of a new drug (Phasomaxtrin) designed to treat Quarantinitis, researchers conducted a...
To test the effectiveness of a new drug (Phasomaxtrin) designed
to treat Quarantinitis, researchers conducted a clinical trial. The
subjects were 512 adult American volunteers with advanced
Quarantinitis. Half were randomly assigned to take the drug and the
other half were randomly assigned to take a placebo. Neither the
subjects nor the doctors who evaluated them knew who was in which
group. After three years, 32 percent of those who got Phasomaxtrin
were no longer afraid to keep staying inside,...
Mary, a colleague of yours, wants to test the effectiveness of a new lesson plan on...
Mary, a colleague of yours, wants to test the effectiveness of a
new lesson plan on two different groups of students. She wants to
perform a t-test, but she is not sure whether to use a
paired or unpaired test. Base on the information provided, how
would you advise your colleague? If she asked you to perform the
calculation for her, how would you use SPSS to do so?
Class, for this DQ, create a hypothetical dataset in SPSS that...
Mary, a colleague of yours, wants to test the effectiveness of a new lesson plan on...
Mary, a colleague of yours, wants to test the effectiveness of a
new lesson plan on two different groups of students. She wants to
perform a t-test, but she is not sure whether to use a paired or
unpaired test. Base on the information provided, how would you
advise your colleague? If she asked you to perform the calculation
for her, how would you use SPSS to do so? Create data in SPSS and
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An investigator wants to test the effectiveness of a new weight loss medication at reducing BMI...
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:...
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