vimlndz422 vimlndz422

09-04-2018
Mathematics

contestada

A compact disc is designed to last an average of 4 years with a standard deviation of 0.8 years.

What is the probability that a CD will last less than 3 years?

Respuesta :

deviousdeceverowx4e9 deviousdeceverowx4e9

12-04-2018

3-4/.8=1.25
then use the probability z chart,

10.56%

!!!

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