[Solution Library] A newspaper article reported that the mean mathematics score on SAT for students from a local high school was 500 and that 20% of the
Question: A newspaper article reported that the mean mathematics score on SAT for students from a local high school was 500 and that 20% of the students scored below 430. Assume that the SAT scores for students from this school follow a normal distribution. (a) Find the standard deviation of the mathematical SAT scores for students from the school. (b) Find the percentage of students at this school whose mathematics SAT scores were above 520.
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Sampling Distribution of the Sample Proportion Calculator - MathCracker.com