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A standardized achievement test has a mean of 50 and a standard deviation of 10. The scores are normally distributed. If the test is administered to 800 selected people, approximately how many will score between 48 and 62?


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The easiest way to solve this question is to use the Norm.DST excel function, with the parameters, entered appropriately. . of 800 students about 372 students ill score between 48 and 62.

mean 50  
std 10  
n 800  
probability( 48 <=x <= 62)
proportion scoring between 48 and 62 is  0.46419








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