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?

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#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#.

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