Question: Efficiency vs frequency Efficiency (%) 82 83 84 85 86 87 88 89 90 Frequency 1 2 2 3 4 4 6 2 1 Making

Efficiency vs frequency

Efficiency (%) 82 83 84 85 86 87 88 89 90
Frequency 1 2 2 3 4 4 6 2 1

Making use of the data generated, interpret the data into meaningful information:

  1. Calculate the arithmetic mean efficiency.
  2. Calculate the standard deviation showing all the important steps.
  3. The probability that the machine's efficiency will fall between 85% and 88%.

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