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Math Help - [SOLVED] Outlier Impact

  1. #1
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    [SOLVED] Outlier Impact

    You have observed the waiting time of 10 customers, who call your helpdesk. The average waiting time you have calculated is 1 minute. However, you have realized that the highest value is an outlier and you exclude it from your analysis.

    After you have excluded this outlier, how would the value
    of average waiting time change?
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  2. #2
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    Quote Originally Posted by tikimasala View Post
    You have observed the waiting time of 10 customers, who call your helpdesk. The average waiting time you have calculated is 1 minute. However, you have realized that the highest value is an outlier and you exclude it from your analysis.

    After you have excluded this outlier, how would the value
    of average waiting time change?
    Well, the choices are that it will either increase, decrease or stay the same. What do you think ....?
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  3. #3
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    sorry yeah....i forgot to include this in the question:

    there are 5 choices here:

    It does not change
    Decrease
    Increase to 1.5 minute
    Increase to 2 minutes
    Decrease to 0.5 minute
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    Quote Originally Posted by tikimasala View Post
    sorry yeah....i forgot to include this in the question:

    there are 5 choices here:

    It does not change
    Decrease
    Increase to 1.5 minute
    Increase to 2 minutes
    Decrease to 0.5 minute
    Well, the choices are that it will either increase, decrease or stay the same. What do you think ....?

    (Can anyone hear an echo here?).
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    I realize those are the options. I'm not sure of the answer though, which is why i was posting it here.
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    Quote Originally Posted by tikimasala View Post
    I realize those are the options. I'm not sure of the answer though, which is why i was posting it here.
    Do you know how to calculate an average? Think about what will happen if the largest value is removed.
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  7. #7
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    ok so it would decrease, but do we know by how much?
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  8. #8
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    Quote Originally Posted by tikimasala View Post
    ok so it would decrease, but do we know by how much?
    Look at the options you were given ..... How many say that the mean decreases? So, do you really need to know by how much it decreases?
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