math

in a set of numbers {78, 79, 81, 82, 85} find

a) mean
b) median
c) standard deviation

is a) 81 b) 81 c) 2.74

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asked by aurthur
  1. mean will be 81

    meadian will 81

    stadndard deviation is wrong ..
    i forgot how to calculate

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    posted by unkname
  2. a is-81
    b is-81
    c is 2.738613

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    posted by Debbie
  3. are you sure that the standard deviation is wrong? because to figure it out, you have to get the mean which is 81. then subtract it from 78, 79, 81, 82, and 85. and square them and would get 4, 9, 0, 1, and 16. then you have to add them and divide by 5 - 1 which is 7.5 and get the square root which is 2.738 and rounded is 2.74

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    posted by aurthur

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