A scientist collected data in 10 trials comparing tired students’ and awake students’ test scores.TrialTired Average ScoreAwake Average Score 1 34% 67% 2 56% 88% 3 60% 90% 4 58% 86% Which trial was the least precise and is unlikely to be reproducible?

Trial 1 is the least consistent with the other trials: its tired-student average is 34%, compared with 56%–60% in Trials 2–4, and its awake-student average is 67%, compared with 86%–90%. Those unusually low scores make Trial 1 seem least likely to be reproducible.

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