Answer:
Mean Absolute Deviation = 5.3333
Explanation:
Xmean = 85
MAD = (85 - 85) + (92 - 85) + (88 - 85) + (80 - 85) + (91 - 85) + (74 - 85) /6
=(0) + (7) + (3) + (5) + (6) + (11) /6
= 32 /6
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