A scientist collected data in 10 trials comparing tired students' and awake students' test scores. Trial Tired Average Score Awake 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 Trial 2 Trial 3 Trial 4

trial 4

Trial 1

Explanation:

Precision can be simply put as how close the second value is to the first one

Given

score 1 : 34%,67%

average = 34+67 / 2 = 50.5

Deviations = 50.5-34 = 16.5 and 50.5-67 = - 16.5

Average of deviations = (16.5 + - 16.5) / 2 = 0.00

score 2 : 56%,88%

Average = 56+88 / 2 = 72

Deviations = 72-56 = 16, 72-88 = - 16

Average of deviation = 0.00

score 3 : 60%,90%

Average = 60+90 / 2 = 75

Deviations : 75-60 = 15, 75-90 = - 15

Average of deviations = 0.00

Score 4 : 58%, 86 %

Average : 58+86 / 2 = 72

Deviations = 72 - 58 = 14, 72-86 = - 14

Average of deviation = 0

Scores in trial 1 are the least precise and unlikely to be reproducible because the deviation of score is high.