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Standard Deviation of SAT Scores

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According to the data from the College Entrance Examination Board, scores on the SAT-I test have a mean of 1017, and Q1 is 880. The scores have a distribution that is approximately normal. Find the standard deviation, then use that result to find P99.

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Solution Summary

This solution shows step-by-step calculations to determine the probability of the z-score being 0.25 for SAT-I scores and other statistical measures.

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First use the standard normal distribution table to get the z score for probability of 0.25. We get this value as ...

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