An observational study determined that there is a strong correlation between getting less than 8 hours of sleep a day and lower test scores. Can it be determined that the low test scores are caused by sleep deprivation? Explain.

No

Step-by-step explanation:

We can not determine that the low test scores are caused by sleep deprivation. Because there are many factors that can affect on a student's test score such as:

not carefully review all the lesson before the test the feeling of nervous in the exam room poor academic ability ... so on

So, getting less than 8 hours of sleep is just one of the independent variables determining the test score, it is not a strong correlation.