Question: The average life of a light bulb is 500 hours. Find

a) the probability that a bulb will last more than 1,000 hours

b) the probability that a bulb will last less than 100 hours

c) the median life

d) the probability that a bulb will last exactly 500 hours

e) the 95 Percentile

(Note: From the table on page 722 of your textbook, e^ ( -3.0) is almost 0.05, so the 95 percentile life would be -3.0/0.002 = 1,500 hours)