On a nationwide test taken by high school students, the mean score was 53 and the standard deviation was 11. The scores were normally distributed. Complete the following statements. (a) Approximately ? v of the students scored between 31 and 75. (b) Approximately 68% of the students scored between and .

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Q: On a nationwide test taken by high school students, the mean score was 47 and the standard deviation…

A: Given,mean(μ)standard deviation(σ)=11Empirical rules:1) P(μ-σ<X<μ+σ)=68%2)…

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A: If the absolute value of z-score is higher than the other then it will provide better grade.

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