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Find the probability of obtaining a reading

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  1. For a standard normal distribution, find: P(z < -2.1) Express the probability as a decimal rounded to 4 decimal places
  2. Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading less than -0.63°C. P(Z< -0.63)
  3. A class is given an exam. The distribution of the scores is normal. The mean score is 74 and the standard deviation is 11. What is the probability that a student scored between 69 and 72? P(69< x< 72)

Reference no: EM132464636

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