You are a research scientist studying bioluminescent bacteria (bacteria that can glow). you grow several plates of bacteria and give them a special chemical that you hypothesize will increase their luminescence, or brightness. you turn off the lights and use a device called a photometer to measure the light levels (in lumens) coming from each plate. you collect the following data:
plate 1: 7 lumens, 6 lumens, 13 lumens
plate 2: 4 lumens, 5 lumens, 7 lumens
plate 3: 3 lumens, 6 lumens, 7 lumens
plate 4: 5 lumens, 5 lumens, 8 lumens
which of the following pieces of data is likely an outlier