Mathematics, 27.03.2021 17:40 EricaCox1

Can anyone find d-bar (the d with the line over it) and explain it to me? For this problem five trials are done at eight am and then twelve am. The eight am trials are 98.4, 98.6, 97.8, 97.1, and 97.5. The 12am ones are 98.9, 99, 97.9, 96.6, and 97.7. The correct answer is -0.14 but I can't get that answer.

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Can anyone find d-bar (the d with the line over it) and explain it to me? For this problem five tria...