Gail bought four snacks that cost $1.00, $1.50, $2.50, and $3.00. what is the average of the deviations from the mean?

For this case we have that the average is given by:

μ = Σx/N

μ=

μ =

μ = 2

On the other hand, the deviation is given by:

σ = Root(Σ(x-μ)^2/N)

σ=

σ =

σ =

σ = 0.790569415

ANswer:

μ = 2

σ= 0.790569415

47 - 90 = 43

43 - 180 = x

x = 137

answer: what are the following choices