A purchasing manager at a university is investigating which brand of LCD projector to purchase for equipping classrooms. Of major concern to her is the lifetime of the light bulbs used in the projectors. One company has published the following information regarding the lifetimes of a sample of 43 bulbs used in its LCD projectors. Frequency 14+ 12- 10+ 8+ 6. 4- 2 HH 700 5 750 9 14 8 800 850 Bulb lifetime (in hours) X 900 5 950 2 1000 Based on this histogram, estimate the mean lifetime (in hours) for the sample of bulbs by this company. Carry your intermediate computations to at least four decimal places, and round your answer to at least one decimal place. 0