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wolverine [178]
4 years ago
15

The average score on a standardized test is 500 points with a standard deviation of 50 points. What is the probability that a st

udent scores more than 400 on the standardized test?
Mathematics
1 answer:
aleksklad [387]4 years ago
6 0
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.
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