The mean score on a nationwide test taken by high school students was 52 with a standard deviation of 11. The scores followed a normal distribution. Approximately 95% of students scored between 30 and 74.
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On a nationwide test taken by high school students the mean.pdf
1. On a nationwide test taken by high school students, the mean score was 52 and the standard
deviation was 11. The scores were normally distributed. Complete the following statements. (a)
Approximately 99.7% of the students scored between 19 and 85 . (b) Approximately of the
students scored between 30 and 74.