My mat composite score is 608.5.what is my percentile in mat?
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According to a z-score calculator, it would be in the 96.9 percentile, which means that the test-taker did better than 96.9% of the sample group of test-takers.
You need the mean and standard deviation in order to calculate the z-score. Neither are given.
A z-score cannot help calculate standard deviation. In fact the very point of z-scores is to remove any contribution from the mean or standard deviation.
z = (x - μ) / σ is the formula where x is the raw score and z is the z-score. μ and σ are the mean and standard deviations and must be known numbers. Multiply both sides by σ zσ = x-μ Add μ to both sides μ + zσ = x x = μ + zσ You calculate the raw score x , given the z-score, μ and σ by using the above formula.
The term "mean" is another way of saying "average." In order to calculate a mean percentage score, you must add together all the percentages, and divide the total by the amount of percentage scores being used.