A cardiologist wants to assess the possible relationship between the number of m
ID: 3202304 • Letter: A
Question
A cardiologist wants to assess the possible relationship between the number of miles run each week by moderate-distance runners and their resting heart rates. Forty runners are selected at random, and their weekly mileage and resting heart rates are determined.
INSTRUCTIONS:
Each of the following is a description of a health-related study. In the table are spaces to answer each of the following questions about each study.
What is/are the independent variable(s)?
Is (are) the independent variable(s) nominal, ordinal, interval, or ratio?
What is the dependent variable?
Is the dependent variable nominal, ordinal, interval, or ratio?
What is the alternative hypothesis?
What is the null hypothesis?
How many treatments (levels) are there in each independent variable?
To what population does your conclusion apply?
Therapist Doe wants to determine if a newly developed meditation course improves student GPAs. His sample consists of 60 students who have recently entered an undergraduate program; 30 of them took the meditation course prior to the beginning of the semester, 30 did not. Dr. Doe has access to each subject's GPA.
a. IV(s):
b. IV(s) nominal, ordinal, interval or ratio?
c. DV(s):
d. DV(s) nominal, ordinal, interval or ratio?
e. Alt H:
f. null H:
g. how many levels in IV(s)
h. population:
a. IV(s):
b. IV(s) nominal, ordinal, interval or ratio?
c. DV(s):
d. DV(s) nominal, ordinal, interval or ratio?
e. Alt H:
f. null H:
g. how many levels in IV(s)
h. population:
Explanation / Answer
A cardiologist wants to assess the possible relationship between the number of miles run each week by moderate-distance runners and their resting heart rates. Forty runners are selected at random, and their weekly mileage and resting heart rates are determined.
What is/are the independent variable(s)?
The independent variable is Weekly millage.
Is (are) the independent variable(s) nominal, ordinal, interval, or ratio?
It is ratio level variable.
What is the dependent variable?
Resting heart rates is dependent variable.
Is the dependent variable nominal, ordinal, interval, or ratio?
It is also a ratio level variable.
What is the alternative hypothesis?
Ha: There is no relationship between the variables weekly mileage and resting heart rates .
What is the null hypothesis?
H0: There is a relationship between the variables weekly mileage and resting heart rates .
How many treatments (levels) are there in each independent variable?
1 level
To what population does your conclusion apply?
All the runners are included in the population.
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