# Chapter 11 Data Analysis and Statistics - 11.3 Use Normal Distributions - 11.3 Exercises - Skill Practice - Page 760: 5

$84\%$

#### Work Step by Step

The normal distribution is symmetric about the mean. Thus using the 68-95-99.7 rule and the graph we get: $P( x\leq\overline{x}+\sigma)=0.15\%+2.35\%+13.5\%+34\%+34\%=84\%$

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