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...
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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
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approximately normal.
Online
67
71
75
67
84
87
71
99
73
67
87
Classroom
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82
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To study the effectiveness of treatments for insomnia, a health psychologist conducted a study with 12...
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To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study with...
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insomnia, a sleep researcher
conducted a study with 12 participants. Four participants were
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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
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Problem: To study the effectiveness of possible treatments for insomnia, a sleep researcher conducted a study...
Problem:
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participants were instructed to count sheep (the Sheep Condition),
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Condition), and four were not given any special instructions. The
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