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6. Normal Distribution and Continuous Random Variables
6. Normal Distribution and Continuous Random Variables / Standard Normal Distribution / Problem 1
Problem 1

The daily caffeine intake in milligrams for adult women in a certain city is normally distributed with a mean of 180 mg180\text{ mg} and a standard deviation of 25 mg25\text{ mg}. If a random sample of 3636 women is selected, what is the probability that their average daily caffeine intake is between 170 mg170\text{ mg} and 190 mg190\text{ mg}?