Question

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.

Answer 1

Answer:

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.