March 24, 2017

Post a New Question

Posted by on Wednesday, October 7, 2009 at 2:46pm.

A certain type of thermal battery for an airplane navigation device backup power has a mean life of 300 hours with a standard deviation of 15 hours. Assume a normal distribution of backup power device lives. What proportion of these batteries can be expected to have lives of 322 hours or less?

  • Math - , Wednesday, October 7, 2009 at 2:52pm

    What portion of the previous answer I gave did you not understand?

Answer This Question

First Name:
School Subject:

Related Questions

More Related Questions

Post a New Question