Professor Jones surveyed her six classes and found that students who slept less than 5 hours the night before an exam received lower exam scores than those students who slept 7 hours or more.What kind of correlation is this relationship between hours of sleep and scores?
A)positive
B)negative
C)zero
D)causal

Question

Quizplus · Accepted Answer

A positive correlation means that as one variable increases, the other variable also increases. In this case, as the number of hours of sleep increases, the exam scores also increase, indicating a positive correlation.

Professor Jones Surveyed Her Six Classes and Found That Students