Concept explainers
a)
To find the type of the study.
a)
Answer to Problem 13E
This is an observational study.
Explanation of Solution
First need to understand about the experimental study and observational study:
Experimental study: Assigning people or things to groups and applying some treatment to one group, while the other group does not receive the treatment.
Observation study: In an observational study, measure or survey members of a sample without trying to affect them.
This is an observational study because the study tries to gather information without influencing the women.
b)
To find whether the study is retrospective or prospective.
b)
Answer to Problem 13E
Prospective study.
Explanation of Solution
There are two types of Observational study:
Retrospective: The data are collected from the past by going back in time.
Prospective: The data are collected in the future.
The data collected from church records. Therefore, it is prospective study.
c)
To explain the subjects with their selection.
c)
Answer to Problem 13E
The women from Finland.
Explanation of Solution
The subjects are women from Finland. The data were collected from church records dating 1640 to 1870.
d)
To find the parameter of interest.
d)
Answer to Problem 13E
The Lifespan of the women.
Explanation of Solution
In this study, the difference in average lifespan between mothers of sons and daughters.
e)
To explain the nature and scope of the conclusion.
e)
Explanation of Solution
The selection or assignment is not random as it is observational study. Therefore, there is no way of knowing that having sons caused a decrease in lifespan.
Chapter 13 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
Additional Math Textbook Solutions
Elementary Statistics: Picturing the World (6th Edition)
STATS:DATA+MODELS-W/DVD
Fundamentals of Statistics (5th Edition)
Statistical Reasoning for Everyday Life (5th Edition)
Basic Business Statistics, Student Value Edition
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