OpenStax, Introductory Statistics 2e §6.2 Using the Normal Distribution · Example 7 · Statistics · Normal distribution
Using the Normal Distribution · Example 7
a. Determine the probability that a random smartphone user in the age range 13 to 55+ is between 23 and 64.7 years old.
b. Determine the probability that a randomly selected smartphone user in the age range 13 to 55+ is at most 50.8 years old.
c. Find the 80^th percentile of this distribution, and interpret it in a complete sentence.
OpenStax, Introductory Statistics 2e · §6.2 Using the Normal Distribution · Example 7
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