Asked by aurthur

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
Answered by unkname
mean will be 81

meadian will 81

stadndard deviation is wrong ..
i forgot how to calculate


Answered by Debbie
a is-81
b is-81
c is 2.738613
Answered by aurthur
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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