Question

Determine whether each of the following situations describes a positive association, a negative association, or no association

1.Higher concentrations of aragonite in seawater increase the number of days it takes for oyster larvae to grow from 120 to 150 ?μm.

2.The number of emails that a student sends during his or her classes is not predictive of his or her grade point average.

3.Lung cancer patients with higher cholesterol levels require lower doses of opioids to manage their pain.

4.Among office workers, lower sodium intake is associated with lower body mass index.

Answer 1

If we see the increasing trend it is positive correlation and if we see decreasing trend it is negative correlation

1. Here it is increasing trend so positive association

2. Here no association as we can't predict y variable

3. Here we see decreasing trend so negative association

4. Here we see decreasing trend so negative association