SOLUTION: The pH of a chemical process is normally distributed with mean of 6.00 and standard deviation of 0.90. What is the probability of a pH between 5.85 and 7.40?

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Question 395671: The pH of a chemical process is normally distributed with mean of 6.00 and standard deviation of 0.90. What is the probability of a pH between 5.85 and 7.40?
Answer by ewatrrr(24785) About Me  (Show Source):
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Hi

*Note: z+=+blue%28x+-+mu%29%2Fblue%28sigma%29

   z = (5.85 - 6) / .90 = -.15/.9 = -.16667

   z = (7.40 - 60/.9 = 1.40/.9 = 1.5556

P(-.16667 < z < 1.5556)  =  .9401 - .4338 = .5063