I have to find the stanines for three numbers (scores), how do I find this? I am stuck and confused.

Guest May 4, 2017

#1**+1 **

I'm guessing a bit here, but how about the following:

Suppose your numbers are x_{1}, x_{2} and x_{3}

Calculate the mean: \(x_{av} = (x_1+x_2+x_3)/3\)

Calculate the standard deviation: \(s = \sum_{k=1}^3(x_k-x_{av})^2/2\)

Calculate \(score_k = 2\frac{x_k-x_{av}}{s}+5\) for k = 1, 2 and 3

Then ** score** will have a mean of 5 and a standard deviation of 2.

Round the resulting values to the nearest integer to get the stanine values.

As I said above, I'm guessing here!

Alan
May 4, 2017