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Problem 5.: The concentration of lead in water wells in a specific region is normally distributed...

Problem 5.: The concentration of lead in water wells in a specific region is normally distributed variable with mean 30 ppm and standard deviation 8 ppm. a. What is the probability that the concentration of lead in a selected well will exceed the maximum of 50 ppm? b. What is the probability the concentration is between 25 and 45 ppm? c. What are the first and third quartiles?

subject: statistics for biology

Math   Statistics-And-Probability   
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