Question

the graph below represents the quiz scores of 10 students and the number of hours of sleep each of them got the night before
quiz scores and sleep
the correlation coefficient of the best fit line is 0.931. what can one conclude about the data set based on this number?
the relationship between increasing sleep and increasing quiz scores is strong.
the relationship between increasing sleep and increasing quiz scores is weak.
the relationship between increasing sleep and decreasing quiz scores is weak.
the relationship between increasing sleep and decreasing quiz scores is strong.

Explanation:

The correlation coefficient (0.931) is positive (indicating a positive relationship, so as sleep increases, quiz scores tend to increase) and close to 1 (values near 1 or -1 indicate a strong relationship). So the relationship between increasing sleep and increasing quiz scores is strong.

Answer:

A. The relationship between increasing sleep and increasing quiz scores is strong.