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A market research firm employs a large number of typists for data entry. The time it takes for new typists to learn the computer system is known to have a normal distribution with a mean time of 90 minutes and standard deviation of 18 minutes.

What proportion of new typists need between 1 and 2 hours to learn the computer system? P(60 ≤ X ≤ 120 min.)

Statistics and Probability, Statistics

  • Category:- Statistics and Probability
  • Reference No.:- M9403368

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