The following plots come from actual data from a real study. In my hypothetical, however, I'm assigning the x-axis to be original hair length -- representing one variable measured in the real study -- and the y-axis will be (-) hair growth (e.g. it's vertically flipped from the original data set) -- representing the other variable from the real study.
My hypothetical study included 12 participants, 6 each with light hair (L) and dark hair (D). Hair growth was measured for a period of about 20 weeks, but due to scheduling, the actual duration of the study varied between subjects.
Hypothesis: Hair growth is inversely related to initial length. Shorter hair grows faster than longer hair.
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