Z = (score-mean)/SD
Calculate Z and find its proportion in table in the back of your stats book labeled "areas under normal distribution". Convert proportion to number of students.
The average score on a standardized test is 500 points with a standard deviation of 50 points. If 2,000
students take the test at a local school, how many students do you expect to score between 450 and 550
points?
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im looking for the answer!!!
2 answers