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An observational study found that the amount of sleep an employee gets each night is associated with job performance. The correlation coefficient was found to be r=0.86. A reader of the study concluded that more sleep causes employees to perform better. Why is such a conclusion not correct?
A)The correlation value should equal 1 for such a conclusion.
B)The correlation value should be negative for such a conclusion.
C)The sample was not representative of the population.
D) Causation cannot be determined from an observational study.
E) The correlation value implies that less than 75% of the variability in job performance can be explained by sleep.

Respuesta :

Answer:

The correct option is D.) Causation cannot be determined from an observational study.

Step-by-step explanation:

The conclusion is not correct because

D.) Causation cannot be determined from an observational study.

Causation determined from an observational study is speculative and cannot be confirmed without data from a real experiment.

ankitprmr2

Answer:

Causation cannot be determined from an observational study.

The conclusion is incorrect for the above statement.

Step-by-step explanation:

The conclusion is more sleep causes employees to perform better.

(A) The correlation value should equal 1 for such a conclusion.

The conclusion is correct for the above statement.

(B)The correlation value should be negative for such a conclusion.

The conclusion is correct for the above statement.

(C) The sample was not representative of the population.

The conclusion is correct for the above statement

D.) Causation cannot be determined from an observational study.

The conclusion is incorrect for the above statement.

Causation can be determined from an observational study. To confirm the causation, we required the data from real experiments.

To know more, please refer to the link:

https://brainly.com/question/15577278?referrer=searchResults

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