Which of the following is the best example of a hypothesis, and why?

Question

a. Do people who sleep too long have trouble concentrating during the day?

b. People who get more than eight hours of sleep each night do worse on tests measuring concentration than those who sleep less than eight hours per night.

c. Concentration is affected by sleep.

d. Too much sleep is as bad for one’s concentration as too little sleep.

Answer 1

There are several things that make a good hypothesis but I think the best ones that can help here are a hypothesis is testable and it shows an expected relationship between two variables. The only answer that fits both of these is B. It is a question wondering about the relationship between 8 hours of sleep and less than 8 hours of sleep on testing ability. Those are the two variables. To test this you would have subjects sleep 8 hours and take a test and then less than 8 hours and and take the same test and see if the hypothesis is correct.