Question

The mean of a set of data is 4.11 and its standard deviation is 3.03. What is the z-score for a value of 10.86?

Answer 1

`z~~2.23`

Explanation:

Let `mu and sigma` be the mean and standard deviation, resp.

Then, `z` -score of `x` is, `z=(x-mu)/sigma`

`" Here, "mu=4.11, sigma=3.03`

`:. z=(10.86-4.11)/3.03=6.75/3.03~~2.23`.