victoria0615 victoria0615

30-12-2016
Mathematics

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There are six teachers in a room, ages, 40, 50, 45, 55, and 65. If a 29 year old teacher enters the room, how will the mean age and standard deviation be affected?

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Cat1215 Cat1215

30-12-2016

The old mean was 51 now the mean is 42.33... (round that to 42) 51 - 42 = 9

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