Student Solutions Manual for Devore's Probability and Statistics for Engineering and the Sciences, 9th
9th Edition
ISBN: 9798214004020
Author: Jay L. Devore
Publisher: Cengage Learning US
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Chapter 9, Problem 86SE
a.
To determine
Explain the reason to think that each child has received both injection and a spray.
b.
To determine
Check whether one method for delivering the vaccine appear to be superior to the other.
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In an article about unusual allergies, a doctor explained that allergy to sulfites is usually seen in patients with asthma.
The typical reaction is a sudden increase in asthma symptoms after eating a food containing sulfites. Studies are
performed to estimate the percentage of the nation's 10 million asthmatics who are allergic to sulfites. In one survey, 39
of 600 randomly selected asthmatics in the country were found to be allergic to sulfites. Find and interpret a 95%
confidence interval for the proportion, p, of all asthmatics in the country who are allergic to sulfites.
Click here to view page 1 of the table of areas under the standard normal curve.
Click here to view page 2 of the table of areas under the standard normal curve.
to
The 95% confidence interval is from
(Round to three decimal places as needed.)
Interpret the confidence interval. Choose the correct answer below.
O A. There is a 95% probability that the sample proportion of all asthmatics in the country who are…
In an article about unusual allergies, a doctor explained that allergy to sulfites is usually
seen in patients with asthma. The typical reaction is a sudden increase in asthma
symptoms after eating a food containing sulfites. Studies are performed to estimate the
percentage of the nation's 10 million asthmatics who are allergic to sulfites. In one survey,
22 of 400 randomly selected asthmatics in the country were found to be allergic to sulfites.
Find and interpret a 90% confidence interval for the proportion, p, of all asthmatics in the
country who are allergic to sulfites.
Click here to view page 1 of the table of areas under the standard normal curve.
Click here to view page 2 of the table of areas under the standard normal curve.
The 90% confidence interval is from to.
(Round to three decimal places as needed.)
Interpret the confidence interval. Choose the correct answer below.
O A. With 90% confidence, the true proportion of all asthmatics in the country who are
allergic to…
An experiment tested the ability of maggots to remove dead tissue from open wounds that would not heal on their own. Sterile maggots were placed in a small pouch
which, in turn, was placed on the wound. 80 women with wounds on their lower limbs were randomly assigned to receive either a traditional surgical treatment or
maggot therapy. After eight days, the percentage of dead tissue in the wounds that underwent maggot treatment was 53.7%, compared to 66.6% with the surgical
treatment. Neither patients nor the doctors evaluating the wounds knew which therapy had been applied. (Patients were blindfolded as bandages were changed.)
Surprisingly, the number of patients that reported a crawling sensation in their wound was about the same in both groups! Complete parts a through d below.
a) What kind of study was this? Select all that apply.
O A. Retrospective
O C. Prospective
B. Placebo-controlled
I D.
Double-blind
O E. Observational
O F. Blocked
O G. Experiment
O H. Randomized
h) le
Chapter 9 Solutions
Student Solutions Manual for Devore's Probability and Statistics for Engineering and the Sciences, 9th
Ch. 9.1 - An article in the November 1983 Consumer Reports...Ch. 9.1 - The National Health Statistics Reports dated Oct....Ch. 9.1 - Pilates is a popular set of exercises for the...Ch. 9.1 - Reliance on solid biomass fuel for cooking and...Ch. 9.1 - Persons having Reynauds syndrome are apt to suffer...Ch. 9.1 - An experiment to compare the tension bond strength...Ch. 9.1 - Is there any systematic tendency for part-time...Ch. 9.1 - Tensile-strength tests were carried out on two...Ch. 9.1 - The article Evaluation of a Ventilation Strategy...Ch. 9.1 - An experiment was performed to compare the...
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