A standardized test for graduate school admission has a mean score of 156 with a standard deviation of 7 and a​ unimodal, symmetric distribution of scores. A test preparation organization teaches small classes of 4 students at a time. A larger organization teaches classes of 25 at a time. Both organizations publish the mean scores of all their classes

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A standardized test for graduate school admission has a mean score of 156 with a standard deviation of 7 and a​ unimodal, symmetric distribution of scores. A test preparation organization teaches small classes of 4
students at a time. A larger organization teaches classes of 25 at a time. Both organizations publish the mean scores of all their classes.
 
A mean score of 163 is ____SD above the mean for the smaller​ organization, and ___ SD above the mean for the larger organization. It is more likely that the smaller organization will have that success 
 

 

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