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How do I find a variance for a set of numbers {1,16,8,17,12}

I got that variance-34.2, but I'm unsure. Any help? Thanks.

math - Reiny, Sunday, January 24, 2010 at 8:16pm
look at his page.

Reiny - April, Sunday, January 24, 2010 at 8:25pm
I looked at that page and did my problem according to the example, but the answer I got wasn't even a choice. Can you help al ittle more please?

  • reiny -

  • reiny -

    No. I thought mean was adding up the numbers and then dividing by how many numbers.
    So .51+.44+.04+.01=1 divided by 4=.25

  • reiny -

    (1 + 16 + 8 + 17 + 12)/5 = 10.8


    where did you get your numbers from ????

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