Question

Prison Sentences The average prison sentence for a person convicted of second-degree murder is 15 years. If the sentences are normally distributed with astandard deviation of 2.1 years, find the following probabilities.P (x> 18) =

Answer 1

Givens.

• The mean is 15 years.

,

• The standard deviation is 2.1 years.

,

• x = 18.

Using a graphic calculator, the probability P(X > 18) is 0.0766.

Therefore, the answer is 0.07