Example of correlational research

Answer 1

AnswerIn a negative correlation, as the values of one of the variables increase, the values of the second variable decrease. Likewise, as the value of one of the variables decreases, the value of the other variable increases.

This is still a correlation. It is like an "inverse" correlation. The word "negative" is a label that shows the direction of the correlation.

There is a negative correlation between TV viewing and class grades-students who spend more time watching TV tend to have lower grades (or phrased as students with higher grades tend to spend less time watching TV).

Here are some other examples of negative correlations:

1. Education and years in jail-people who have more years of education tend to have fewer years in jail (or phrased as people with more years in jail tend to have fewer years of education)

2. Crying and being held-among babies, those who are held more tend to cry less (or phrased as babies who are held less tend to cry more)

We can also plot the grades and TV viewing data, shown in the table below. The scatterplot below shows the sample data from the table. The line on the scatterplot shows what a negative correlation looks like. Any negative correlation will have a line with that direction.

Participant GPA TV in hours per week #1 3.1 14 #2 2.4 10 #3 2.0 20 #4 3.8 7 #5 2.2 25 #6 3.4 9 #7 2.9 15 #8 3.2 13 #9 3.7 4 #10 3.5 21

In this sample, the correlation is -.63.

Answer 2

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