Here's how to approach this problem. First write down the given variables as stated in the problem.

Now, recall that Standard deviation **(sd) = ****√** variance

Substitute the values we were given in the problem;

**sd = ****√** 16 = 4

With the help of the standard normal distribution table;

P(X > 15.2) = P ( Z > (15.2 - 14) / 4 )

= P(Z > 0.3)

= 1 - 0.6179

**=**** **__0.3821__

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