The mean score of the overall population of high school

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A high school decides to add a new course that prepares randomly selected seniors to take a certain standardized test, in the hopes of raising their scores. The mean score of the overall population of high school seniros is known to be 455 with a standard deviation of 100. the mean score for thsoe who took the course was 500. Compute the effect size of the new preparatory course?

Reference no: EM13611833

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