What percentage of the area under the normal curve is within +/-1, +/-2, and +/-3 standard deviations from the mean?

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 31PPS
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What percentage of the area under the normal curve is within +/-1, +/-2, and +/-3 standard deviations from the mean?
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