Mathematics, 30.10.2020 16:20 bossybaby12

The time it takes a student to walk from the dorm to the chemistry lab follows roughly a Normal distribution with a mean of 20 minutes and a standard deviation of 3 minutes. a. How long does it take the slowest 10% of the students to walk from the dorms to the chemistry lab?
b. What proportion of students is faster than 15 minutes when walking from the dorm to the chemistry lab?

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The time it takes a student to walk from the dorm to the chemistry lab follows roughly a Normal dist...