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Normal Probability: Minimum score needed for aptitude test

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The distribution of scores on a standardized aptitude test is approximately normal with a mean of 500 and a standard deviation of 105 . What is the minimum score needed to be in the top 25% on this test? Carry your intermediate computations to at least four decimal places, and round your answer to the nearest integer.

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Solution Summary

The solution provides step by step method for the calculation of minimum score needed on a standardized aptitude test to be in the top 25% on the test using the Z score. Formula for the calculation and Interpretations of the results are also included.

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