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anonymous

  • one year ago

Here are 10 test scores: 30, 74, 76, 77, 78, 79, 80, 80, 82, 84. The mean of these numbers are 74. Does this set have an outlier and, if so, how does removing it affect the mean? A. The set has 30 as an out outlier, and removing it increases by about 5. B. The data has no outliers. C. The set has 30 as an outlier and removing it decreases the mean by about 5. D. The set has 30 as an outlier and removing it decreases the mean by about 10.

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  1. anonymous
    • one year ago
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    @Lyralei @mathscience4ever @jordanawest22 @Slacker @sleepyjess @jane11509

  2. anonymous
    • one year ago
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    @Ghostedly @greenleaf1 @gaba

  3. jane11509
    • one year ago
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    I'm not sure :/

  4. aripotta
    • one year ago
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    30 is the outlier. what's the mean after you remove it?

  5. anonymous
    • one year ago
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    @AriPotta i'm not sure

  6. jane11509
    • one year ago
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    I will help you

  7. jane11509
    • one year ago
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    I think the mean would be 78.8

  8. aripotta
    • one year ago
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    giving her the answer isn't helping her

  9. jane11509
    • one year ago
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    Sorry The mean is the average of the numbers. It is easy to calculate: add up all the numbers, then divide by how many numbers there are. In other words it is the sum divided by the count. this is how you find the mean

  10. aripotta
    • one year ago
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    \[\frac{ 74+ 76+77+ 78+79+80+80+82+84 }{ 9 }=mean\]

  11. anonymous
    • one year ago
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    Ok thank you @jane11509

  12. jane11509
    • one year ago
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    You're welcome :)

  13. jane11509
    • one year ago
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    Basically add all the numbers together and there are 9 minbers so divide the sum by 9 and BAM you have it :)

  14. anonymous
    • one year ago
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    Thank you too @AriPotta

  15. aripotta
    • one year ago
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    no problemo

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