What is the approximate shaded area under the normal curve shown below? - 20 -lo A) 95% B) 84.5% C) 81.5% D) 68%

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A: c=0.98​, s=6​, n=13

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A: Given: μ=10X: {3,13,11,10,12,13,9,11,12,12,11,13,10}X¯=11.23077n=13s=1.42325

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