QUESTION 10 When two variables are correlated with each other and with a third v
ID: 3073686 • Letter: Q
Question
QUESTION 10
When two variables are correlated with each other and with a third variable, which type of correlation is suggested?
Weak
Partial
Perfect
Negative
1 points
QUESTION 11
The covariance is
An unstandardized version of the correlation coefficient.
A measure of the strength of relationship between two variables.
Dependent on the units of measurement of the variables.
All of the above.
1 points
QUESTION 12
A researcher conducts some research in which they identify a significant positive correlation (r = .42) between the number of children a person has and their life satisfaction. Which of the following is it inappropriate to conclude from this research?
That having children makes people more satisfied with their life.
That someone who has children is likely to be happier than someone who doesn't.
That the consequences of having children are unclear.
That it is possible to predict someone's life happiness partly on the basis of the number of children they have.
1 points
QUESTION 13
A researcher is wishing to undertake a study of the relationship between a specific type of analgesia and levels of pain experienced by sufferers of rheumatoid arthritis. It is believed that level of physical activity will influence both of these variables and so it has been decided that the use of partial correlations will allow for this in the research. On which of the following should a correlation be performed?
Type of analgesia used and level of pain experienced, controlling for level of physical activity
Level of pain experienced and level of physical activity, controlling for type of analgesia used
Type of analgesia used and physical activity level, controlling for level of pain experienced
None of the above
1 points
QUESTION 14
In order for accurate measures of the linear relationship between two variables to be achieved, what type of data are required if using Pearson’s correlation coefficient?
Interval
Nominal
Ordinal
Categorical
a.Weak
b.Partial
c.Perfect
d.Negative
Explanation / Answer
Q 10 Answer: Partial Correlation
Q 11 Answer: An unstandardized version of the correlation coefficient.
Reason : Because the range of variable is - infitiy to + infiity.
Q 12 Answer: That having children makes people more satisfied with their life.
Reason : Because this statement shows correlation fallacy
Q 13 Answer: Type of analgesia used and physical activity level, controlling for level of pain
experienced
Answer: Because we need to control the levels of pain experienced by sufferers of rheumatoid arthritis
Q 14 Answer: Interval
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