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Determining the percentage of scores

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A study was designed to investigate the effects of two variables, (1 ) A student's level of mathematical anxiety and (2) teaching method, on a student's achievement in a mathematics course. Students who had a low level of mathematical anxiety were taught using the traditional expository method. These students obtained a mean score of 500 with a standard deviation of 50 on a standardized test. Assuming a bell-shaped distribution, what percentage of scores exceeded 400?

Reference no: EM132858056

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