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April 18, 2014

April 18, 2014

Posted by **Stacy** on Wednesday, December 5, 2012 at 12:13am.

I am having a small Problem Working this Problem. I am just not understanding. Could someone please assist?

The lifetime of a brand of DVD player follows a normal distribution with

a mean of 8 years and a standard deviation of 6 months. Find the probability

that the lifetime is more than 7 years.

- Statistics -
**PsyDAG**, Wednesday, December 5, 2012 at 2:31pmZ = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability related to the Z score.

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