flynessmps flynessmps

07-02-2017
Mathematics

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The class average on a math test was 77.5 and the standard deviation was 5.8 find the Z score for a test score of 83 and the percentage of the class who scored below 83

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LammettHash LammettHash

07-02-2017

[tex]Z=\dfrac{83-77.5}{5.8}\approx0.9483[/tex]

[tex]\mathbb P(X<83)=\mathbb P(Z<0.9483)\approx0.8285=82.85\%[/tex]

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