Do rats take the weekend off?

Your guess, before you look

Do you think rats take weekends off? Write yes or no, and what else might explain fewer calls on Saturday.

Do not change this once you have written it. Being wrong here is the point — it is what makes the next part mean something.

Find out

Read the chart on the screen. Answer each question here.

Try it

Open the pool and do the steps on screen. Write the number you find.

What I found, in one sentence

I think

because

and I checked it by

The third part is the one that counts. It has to name something you did to your own screen.

After the reveal

Did your guess survive? If not, what did you assume?