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Standard Normal Distribution
6. Normal Distribution & Continuous Random Variables / Standard Normal Distribution / Problem 7
Problem 7

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\(\text{ mg}\)?