Question
In: Statistics and Probability
In a study of the effectiveness of a fabric device that acts like a support stocking...
In a study of the effectiveness of a fabric device that acts like a support stocking for a weak or damaged heart, 110 people who consented to treatment were assigned at random to either a standard treatment consisting of drugs or the experimental treatment that consisted of drugs plus surgery to install the stocking. After two years, 40% of the 60 patients receiving the stocking had improved and 30% of the patients receiving the standard treatment had improved. (Use a statistical computer package to calculate the P-value. Use pexperimental − pstandard. Round your test statistic to two decimal places and your P-value to four decimal places.)
| z | = |
| P | = |
Do these data provide convincing evidence that the proportion of
patients who improve is higher for the experimental treatment than
for the standard treatment? Test the relevant hypotheses using a
significance level of 0.05.
Yes
No
You may need to use the appropriate table in Appendix A to answer
this question.
Solutions
orchestra answered 1 year agoRelated Solutions
In a study of the effectiveness of a fabric device that acts like a support stocking...
In a study of the effectiveness of a fabric device that acts
like a support stocking for a weak or damaged heart, 110 people who
consented to treatment were assigned at random to either a standard
treatment consisting of drugs or the experimental treatment that
consisted of drugs plus surgery to install the stocking. After two
years, 35% of the 60 patients receiving the stocking had improved
and 26% of the patients receiving the standard treatment had
improved. (Use a...
In order to gain information on the required stocking levels of hospital resources, a study was...
In order to gain information on the required stocking levels of
hospital resources, a study was conducted into the usage of latex
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all employees in the hospital was greater than 23. The resource
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Write the equation for the reaction of HSO3- with water in which it acts like an...
Write the equation for the reaction of HSO3- with water in which
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Effectiveness of distance learning: A study was done to compare the effectiveness of distance learning with...
Effectiveness of distance learning: A study was
done to compare the effectiveness of distance learning with
traditional classroom instruction. Eleven students took a business
administration course online, while 14 students took it in a
classroom. The final scores were as follows. It is reasonable to
assume that the samples come from populations that are
approximately normal.
Online
67
71
75
67
84
87
71
99
73
67
87
Classroom
82
75
67
82
71
82
75
82
99
67
91...
As part of a study, two fabric types are tested for flammability at the National Bureau...
As part of a study, two fabric types are tested for flammability
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recorded after a paper tab is ignited on the center of a piece of
fabric. Forty five (45) 3-foot-square pieces of Fabric A are burned
with a mean burn time of 12.3 seconds with standard deviation of
1.1 seconds. Fifty five (55) 3-foot-square pieces of Fabric B are
burned and have mean burn time of 13.6 seconds...
To study the effectiveness of treatments for insomnia, a health psychologist conducted a study with 12...
To study the effectiveness of treatments for insomnia, a health
psychologist conducted a study with 12 participants. Four
participants were instructed to count sheep (Sheep Condition), four
were told to concentrate on their breathing (Breathing Condition),
and four were not given any special instructions. Over the next few
days, measures were taken of how many minutes it took each
participant to fall asleep. The average times for the participants
in the Sheep Condition were 14, 28, 27, and 31; for...
To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study with...
To study the effectiveness of possible treatments for
insomnia, a sleep researcher
conducted a study with 12 participants. Four participants were
instructed to count
sheep (the Sheep Condition), four were told to concentrate on their
breathing (the
Breathing Condition), and four were not given any special
instructions. Over the next
few days, measures were taken how long it took each participant to
fall asleep. The
average times for the participants in the Sheep Condition were 14,
28, 27, and 31;...
To study the effectiveness of a speed-reading course, eighteen people participated in a study. Prior to...
To study the effectiveness of a speed-reading course, eighteen
people participated in a study. Prior to taking the course, the
reading speed (in words per minute) was recorded for each
participant. The eighteen participants then took the speed-reading
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The data appear in the Reading worksheet of the Two Population
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a) What are the null and alternative hypotheses to test if
reading speed...
Problem: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study...
Problem:
To study the effectiveness of possible treatments for
insomnia, a sleep researcher conducted a study in which four
participants were instructed to count sheep (the Sheep Condition),
four were told to concentrate on their breathing (the Breathing
Condition), and four were not given any special instructions. The
average number of minutes taken for each participant to fall asleep
over the next seven days were 14, 28, 27, and 31 minutes for the
Sheep condition; 25, 22, 17, and 14...
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From the case study and discussion preparation study, evaluate
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opinion. Provide support for your rationale.
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