Light life The following graph is a cumulative relative frequency graph showing the lifetimes (in hours) of 200 lamps. 6. 62 100- 80 60 40 20- 500 700 900 1100 1300 1500 Lifetimes (h) (a) What is the percentile for a lamp that lasted 900 hours? (b) Estimate and interpret the 60th percentile of this distribution. Cumulative relative frequency (%)

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