Notebook computer batteries have a mean life before rechargingof 3.5 hours and a

Question

Notebook computer batteries have a mean life before rechargingof 3.5 hours and a standard deviation of 1.5 hours. If yourbattery is fully charged, find the probability that your batterywill last more than 2.5 hours. Please show your work. Notebook computer batteries have a mean life before rechargingof 3.5 hours and a standard deviation of 1.5 hours. If yourbattery is fully charged, find the probability that your batterywill last more than 2.5 hours. Please show your work.

Explanation / Answer

Given =3.5, =1.5 The probability is P(X>2.5) = P((X-)/ > (2.5-3.5)/1.5) =P(Z>-0.67) =0.7485 (check normal table)

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