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Mathematics, 13.11.2020 21:00 anggar20
An observational study found that the amount of time a child spends learning an instrument is associated with standardized testing performance. The correlation coefficient was found to be r = 0.92. A conclusion was made that the more time a child spends learning an instrument, the better the child performs on standardized tests. Why is such a conclusion not correct?
a
Causation cannot be determined from an observational study.
b
The sample was not representative of the population.
c
The correlation value should be negative for such a conclusion.
d
The correlation value should equal 0 for such a conclusion.
e
The correlation value implies that less than 85% of the variability in standardized testing performance can be explained by learning an instrument.
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