Learning Materials
Features
Discover
Chapter 1: Q 4. (page 31)
Before planning and conducting a study to obtain information, what should be done?
Literature study is a must before planning and conducting a study.
Over 30 million students worldwide already upgrade their learning with Vaia!
All the tools & learning materials you need for study success - in one app.
Get started for free
Child-Proof Bottles.Designing medication packaging that resists opening by children, but yields readily to adults presents numerous challenges. In the article "Painful Design" (American Scientist, Vol. 93, No. 2, pp. 113-118 ), H. Petroski examined the packaging used for Aleve, a brand of pain reliever. Three new container designs were given to a panel of children aged 42 months to 51 months. For each design, the children were handed the bottle, shown how to open it, and then left alone with it. If more than 20 % of the children succeeded in opening the bottle on their own within 10 minutes, even if by using their teeth, the bottle failed to qualify as child resistant.
Identify the
a. experimental units. b. response variable.
c. factor (s). d. levels of each factor.
e. treatments.
Oklahoma State Officials. The five top Oklahoma state officials are displayed in Table 1.2 on page 11. Use that table to solve the following problems.
(a) List the possible samples of size 1 that can be obtained from the population of five officials.
(b) What is the difference between obtaining a simple random sample of size 1 and selecting one official at random?
(c) List the possible samples (without replacement) of size 5 that can be obtained from the population of five officials.
(d) What is the difference between obtaining a simple random sample of size 5 and taking a census of the five officials?
In a designed experiment, there are two factors, say, Factor Aand Factor B. Factor Ahas four levels, say, ; Factor B has two levels, say,.
(a) Construct a schematic for the treatments similar to Table 1.8 on page 27.
(b) Use part ( a ) to determine the number of treatments.
(c) Could you have determined the answer for part ( b ) without constructing the schematic in part ( a )? Explain your answer.
The members of a population have been numbered 1-372. A sample of size 5 is to be taken from the population, using systematic random sampling.
(a) Apply Procedure 1.1 on page 17 to determine the sample ( i.e .. the numbers corresponding to the members of the population that are included in the sample ).
(b) Suppose that, in Step 2 of Procedure 1.1, the random number chosen is 10 ( i.e., k = 10 ). Determine the sample.
Ideally, in stratified sampling, the members of each stratum should be relative to the characteristic under consideration.
What do you think about this solution?
We value your feedback to improve our textbook solutions.
Explanations 
Textbooks 
Exams 
GCSE 
IGCSE 
AS 
A Level 
International A Level 
University Admissions Tests 
Flashcards 
Vaia AI 
Notes 
Study Plans 
Study Sets 
Find a job 
Find a degree 
Student Deals 
Magazine 
Mobile App