OPENINTRO:STATISTICS
4th Edition
ISBN: 9781943450077
Author: OPENINTRO
Publisher: amazon.com
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Chapter 1.2, Problem 4E
a.
To determine
Find the main research question of the study.
b.
To determine
Describe the subjects in the study and identify the number of subjects.
c.
To determine
Specify the variables in the study.
Identify the type of each variable.
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Study 1: A study of 300 high school
students was done. Half of them were
instructed to drink soda every day. The
other half was instructed to not drink soda
at all. After one month, the half that were
drinking soda had gained an average of five
pounds more than the half that did not
drink soda.
e. How could this study be changed to
make it a double-blind study?
Study 1: A study of 300 high school
students was done. Half of them were
instructed to drink soda every day. The
other half was instructed to not drink soda
at all. After one month, the half that were
drinking soda had gained an average of five
pounds more than the half that did not
drink soda.
a. Is this a controlled study? Why or why
not?
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,
32 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.
to
The 90% confidence interval is from
(Round to three decimal places as needed.)
Chapter 1 Solutions
OPENINTRO:STATISTICS
Ch. 1.1 - Prob. 1GPCh. 1.1 - Prob. 1ECh. 1.1 - Prob. 2ECh. 1.2 - Prob. 2GPCh. 1.2 - Prob. 3GPCh. 1.2 - Prob. 4GPCh. 1.2 - Prob. 6GPCh. 1.2 - Prob. 7GPCh. 1.2 - Prob. 3ECh. 1.2 - Prob. 4E
Ch. 1.2 - Prob. 5ECh. 1.2 - Prob. 6ECh. 1.2 - Prob. 7ECh. 1.2 - Prob. 8ECh. 1.2 - Prob. 9ECh. 1.2 - Prob. 10ECh. 1.2 - Prob. 11ECh. 1.2 - Prob. 12ECh. 1.3 - Prob. 9GPCh. 1.3 - Prob. 11GPCh. 1.3 - Prob. 12GPCh. 1.3 - Prob. 13GPCh. 1.3 - Prob. 13ECh. 1.3 - Prob. 14ECh. 1.3 - Prob. 15ECh. 1.3 - Prob. 16ECh. 1.3 - Prob. 17ECh. 1.3 - Prob. 18ECh. 1.3 - Prob. 19ECh. 1.3 - Prob. 20ECh. 1.3 - Prob. 21ECh. 1.3 - Prob. 22ECh. 1.3 - Prob. 23ECh. 1.3 - Prob. 24ECh. 1.3 - Prob. 25ECh. 1.3 - Prob. 26ECh. 1.3 - Prob. 27ECh. 1.3 - Prob. 28ECh. 1.4 - Prob. 16GPCh. 1.4 - Prob. 17GPCh. 1.4 - Prob. 29ECh. 1.4 - Prob. 30ECh. 1.4 - Prob. 31ECh. 1.4 - Prob. 32ECh. 1.4 - Prob. 33ECh. 1.4 - Prob. 34ECh. 1 - Prob. 35ECh. 1 - Prob. 36ECh. 1 - Prob. 37ECh. 1 - Prob. 38ECh. 1 - Prob. 39CECh. 1 - Prob. 40CECh. 1 - Prob. 41CECh. 1 - Prob. 42CECh. 1 - Prob. 43CECh. 1 - Prob. 44CE
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