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Year 8 maths · W.4 · Data and sampling

Compare two groups using the MAD

Subtract the means, then divide the difference by the MAD.

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  1. Team A has a mean score of 19 and Team B has a mean score of 22. Both teams have a mean absolute deviation of 6. The difference between the means is how many times the MAD?

    Answer: 0.5

  2. Team A has a mean score of 17 and Team B has a mean score of 29. Both teams have a mean absolute deviation of 6. The difference between the means is how many times the MAD?

    Answer: 2

  3. Team A has a mean score of 11 and Team B has a mean score of 15. Both teams have a mean absolute deviation of 4. The difference between the means is how many times the MAD?

    Answer: 1

Tip: Subtract the means, then divide the difference by the MAD.

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