In this experiment, we'll ask you questions about patterns of data in a graph. The graph will only stay on the screen for 15 seconds before disappearing, so pay close attention! After the graph disappears, we'll ask you to type a description of TWO interesting comparisons or patterns that you noticed in the data - so try your best to remember at least TWO!

Graph background: Imagine that a market research company wants to test the battery life of two phone models (BerryTech and GigaMax), across audio calls, and across video calls (which include both audio and video). The graph below shows the mean (average) battery life of those phones across 50 tests.

For now, only the axes are visible. When you are ready, you can reveal the data (for only 15 seconds) by pressing the right arrow key on your keyboard.

You must answer the following questions before completing the experiment.

Did you notice anything that didn't make sense in the plot? (If not, simply write "no" in the box below; if yes, please describe)

You must answer the following yes or no questions before completing the experiment.

Did you previously notice that for the BerryTech phone, its battery life was longer for Audio + Video calls than for Audio calls alone, which seems unlikely?

Please answer honestly! This may (or may not) be a trick question, so it is very important to us that you answer it based on what you really saw.

Yes     No

You must answer the following yes or no questions before completing the experiment.

Did you previously notice that the GigaMax phone had the same duration of battery life for Audio + Video calls, compared to for Audio calls, which seems unlikely?

Please answer honestly! This may (or may not) be a trick question, so it is very important to us that you answer it based on what you really saw.

Yes     No Next