Question

Given the numbers [3,4,5] the standard deviation is:

Answer 1

are you asking for sample or population standard deviation, the one I learned in alegebra 2 (assuming you are in alegbra 2 and not a stats class) is \[\sqrt{\frac{( x_{1}-y)^2+(x_{2}-y)^2+...+(x _{n}-y)^2 }{ n }}\] where n is the number of elements in the data set and y is the mean of the data set. x sub 1 is the first term in the data set

Answer 2

this is a stats class :) sorry for not specifying

Answer 3

the formula I gave you was for the population standard deviation. The garbage under the radical is called the variance, and the square root of the variance is the pop sd. I would need more context for this problem to help you. What are those numbers for?