moshaheer1711 moshaheer1711
  • 12-02-2024
  • Mathematics
contestada

Find following table gives the lifetime of 200 bulbs. Calculate
the mean lifetime of a bulb by step deviation method :
Class 0-20 20-40 40-60 60-80 80-100 100-120
Frequency 6 8 f1 12 6 5

Where frequency 6, 8, f1 and 12 are in ascending order. quick ans gets brainly

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